Extending battery life

The battery life on this phone seems so much greater than the previous two I had.
I've turned off push notifications, checked to close as many programs as possible.
What else can I do to minimize battery use?
Twice this week, it's been on red and once the phone was dead. I usually listed to music on the way to work (30 mins) (I always check to make sure it's off when I arrive) and then I send a few text. I don't use internet at work generally.
I've re-set the phone. I thought I had a lemon phone, but a friend is having similar battery issues.
Any suggestions would be appreciated. Thanks.
Message was edited by: Sean M

http://www.apple.com/batteries/iphone.html
This should help.

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Forum Mods, Please make this a sticky: BlackBerry PlayBook battery power charge, discharge characteristics, and guidance on extending battery life

BlackBerry PlayBook battery power charge, discharge characteristics, and guidance on extending battery life
KB27705
Overview
The BlackBerry PlayBook may come to a power state where it is unable to power on; a Yellow LED may flash in a sequence of 5 flashes, the BlackBerry PlayBook may boot up to the BlackBerry PlayBook Logo and then power off, may not power on at all.
Discharge behavior under normal use:
Under normal active use, a battery drained to 10% will cause the device to prompt the BlackBerry PlayBook user (notification and audible beep)
Without connecting a charger the device will automatically shut down at 3.53V (0%)
Pressing the power button may allow successful boot, but it will turn off again very quickly
Discharge behavior under no use:
A device left unused but in ‘Stand By’ will warn the BlackBerry PlayBook user at 10% (notification and audible beep)
The warning may not be noticed and the device will go back to ‘Stand By’
Letting the device drain in standby mode drains the battery slower, but more completely
Device will still shut off at 3.53V (0%), but it less likely to successfully boot afterwards
Discharge behavior under 3.53V (0%):
If the device is left to shutoff, the battery will continue to drain below 3.53V due to quiescent current draw from the motherboard and the battery fuel gauge
With the battery between 2.7V-3.53V, pressing the power button causes the LED to flash a pattern (1 solid red light followed by 5 yellow blinks) to indicate low battery (PlayBook Tablet OS version 1.0.5, and above)
Below 2.7V there is no activity, or LED pattern displayed
Charge Behaviour:
The provided charger should be used to charge the device. The optional 12 volt rapid charger is may reduce charging times
to approximately 3 to 4 hrs. Standard Blackberry smartphone chargers, other AC adapter USB chargers, or computer USB ports
are not recommended for the sole purpose of charging the PlayBook as with these methods it may take more that 12 hours to
charge the BlackBerry Playbook.
If the battery voltage is below 3.53V(0%) then the charging behaviour is dependent on the software version. The charging code will limit the charging current to under 400 milliamps, during which time, it may take an hour to reach 3.53 Volts. Once the battery voltage rises past 3.53 volts, then "high-rate" charging will start. If, after charging the Tablet for 4 to 6 hours still does not result in LED activity, attempt to force power on the BlackBerry Playbook by pressing and holding only the Power Button for only 20 seconds.
Prior to BlackBerry Tablet OS 1.0.5:
A BlackBerry PlayBook will never charge while powered off in BlackBerry Tablet OS versions prior to 1.0.5.
The device will show a red light when the charger is connected and then nothing more
Repeated connection of the charger can recover the device in some instances.
Once the battery voltage rises above 3.53V the system will boot and the UI will show charging
Starting in BlackBerry Tablet OS 1.0.5:
The device will show a solid red LED, followed by a solid yellow LED as the device boots into charging mode. This is followed by a yellow pulsating LED indicating charging in progress.
The time span between the red and yellow lights can be as long as 45 seconds as the device boots into charging mode.
Once the yellow LED illuminates, the device can be started, but it is advisable to let it charge for at least 3.5 hours to achieve a sufficient charge.
The device will show a solid green LED once the device is fully charged.
Starting in BlackBerry Tablet OS 2.0.1:
Once the yellow LED begins pulsating indicating charging mode, if the BlackBerry PlayBook is disconnected from the charger, the following graphic will be displayed on the screen, indicating charging is not complete, and to reconnect the power source. The graphic will be displayed for 20 seconds before the BlackBerry® PlayBook powers off if the power source is not reconnected. The same graphic will also be displayed if the BlackBerry PlayBook is turned on and there is not sufficient power to perform the boot process.
If the BlackBerry PlayBook is plugged into a power source, and the power button is pressed to power on the device, the following graphic will be displayed if there is not sufficient power to perform the boot process. If this occurs, the BlackBerry PlayBook should be left plugged in to gain enough charge to boot.
Additional Information
Turning off the BlackBerry PlayBook and using standby mode.
Checking the battery power levelOn the status bar, tap the battery icon. When the battery power level is low, the BlackBerry PlayBook tablet will display a notification.
Enter standby modePress the Power button on the top of the BlackBerry PlayBook..
Exit standby modeSwipe down from the top frame to the bottom frame
Turn off the BlackBerry PlayBookPress and hold the Power button. Tap Shut Down.
To extend the BlackBerry PlayBook battery life, charge it regularly, close unused applications and keep the BlackBerry Playbook out of the sun and other hot places. The following may also be used to extend battery life:
Dim the screenOn the status bar, tap the Options icon (a gear), select the Screen tab and change the Brightness setting
Turn off the screen automaticallyOn the status bar, tap the Options icon, select the Screen tab and change the Backlight Time-out field
Enter standby mode automaticallyOn the status bar, tap the Options icon, select the Screen tab and change the Standby Time-out field
Turn off Wi-Fi when not in useOn the status bar, tap the Wireless icon and set the Wi-Fi switch to Off
Turn off Bluetooth connectivity when not in use
On the status bar, tap the Bluetooth icon and set the Bluetooth switch to Off
Pause apps when you show the home screen or switch between apps On the status bar, tap the Options icon, select the General tab and set the Application Behavior switch to Paused
With the upgrade to PlayBook OS 2.1.0.1032 the following message may be displayed when connecting the Playbook to a PC using the micro-USB cable:
Unable to charge battery with connected source
This message is displayed because the voltage provided is insufficient for charging. The USB voltage is limited to 384mA even if the maximum tolerance is 500mA. The voltage is limited to 384mA by design to avoid violating the USB specification which states USB devices cannot draw more than 500mA from the USB port.

TroyTempest wrote:
I guess it's not what you know but whom you know.
Yup! Glad you're here though. I appreciate your contributions in the forums myself.

How to extend battery life in Mountain Lion?

I have an Macbook 5,2 and recently I update Mac OS X from Snow Leopard to Mountain Lion (10.8.3 12D58). Current main problem is my battery life reduced from 5 hours to 1:58:00. This is crazy. Are there some applications runs on the back ground? How to uninstall useless applications and extend battery life? Looking forward to get help from this forum.
Best Regards
Stephen Lee

Runaway applications can shorten battery runtime ...

When talking for extended periods of time, will plugging in my phone extend battery life?

When talking for extended periods of time, will plugging in my phone extend battery life?

If you mean can you talk longer without running out of battery, yes, it will probably last longer.
If you mean will it have an effect on the long-term life expectancy of your battery, I don't know.

In an iPhone 3GS (or 4G), can a user configure the WiFi power-save to extend battery life?

In an iPhone 3GS (or 4G when I upgrade), can a user configure the WiFi power-save operation to extend the battery life? For example: Can a user turn on/off WiFi power-save operation? Can a user specify WiFi sleep duration? Thanks in advance for any helpful advice.

Yikes! Thanks, Templeton. Do WiFi app programmers have control over power-save settings? For example, can a first VoIP app be more energy-efficient than a second VoIP app?

Extended battery life for droid 2 ?

how much longer ...will the battery last with an extended battery for the droid 2?

My battery lasts well. After reading about Froyo 2.2 having an internal app/task manger, I uninstalled my Advanced Task Manager and my battery is lasting noticeably longer. It's quite good for a smartphone now. It is important to remember to 'break in' the battery when you get the phone, by charging it up to full then letting it run down to 5% then charge fully (uninterrupted) to full and do this the first 2 or 3 power cycles with your phone and it will increase battery life a LOT. If you have an ATK on your Droid 2 or original Droid with the 2.2 update, uninstall it, that was the best thing I did.

Best way to extend battery life?

I have been using my IPAD with it being plugged in when I can. I feel this may help to prolong battery life than for the battery to charge/discharge so often. Any thoughts? Thank you!

The quickest way (and really the only way) to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter (5W). When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery (25 watt-hours) will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes. The new iPad has a larger capacity battery (42 watt-hours), so using the 10W charger will obviously take longer. If you are using your iPad while charging, it will take even longer. It's best to turn your new iPad OFF and charge over night. Also look at The iPad's charging challenge explained http://www.macworld.com/article/1150356/ipadcharging.html
Also, if you have a 3rd generation iPad, look at Apple: iPad Battery Nothing to Get Charged Up About
http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
 Cheers, Tom

SpeedStep in MacOS = no whine & extended battery life

As a lot of you might have tried WindowsXP using Boot Camp by now you probably noticed that the whine disappears when using windows well this is because Windows XP makes use of Intel's SpeedStep technology (unlike Mac OS 10.6) and when idle it lowers cpu speed to 988Mhz (on my 1.83Ghz) and it also lowers the cpu voltage to 1.0v down from 1.4v I beleive this is what elimites the whine. There has been a person who goes by the name "Cryptonome" who has been working on a way to control the cpu frequency in order to eliminate whine and increase battery life, please visit http://www.Cryptonome.com for more information.

Mac OS X does indeed support SpeedStep, and uses it
extremely aggressively.
The CPU whining noise is most likely related to C
state management ("nap" in Mac OS terms), which is
related but orthogonal.
Typically, noise like the whine being discussed ad
nauseam here is radiated from power supply components
(capacitors and magnetics most of the time), and it
is caused by sudden, repeated fluctuations in the
current being drawn from the power supply.
SpeedStep transitions don't typically result in
sudden changes in power supply current; when the VID
bits change the power supply ramps up or down a
little, and the load on the power supply changes
proportionately.
Conversely, on a transition into or out of C4, the
CPU is being switched almost completely off, or on;
this represents an enormous change in load for the
power supply. If the power supply is making noise,
these large changes tend to result in a much louder
noise than the smaller changes that you would see
from a SpeedStep transition.
Note that the effectiveness of the Photobooth "hack"
tends to support the argument that it is nap and not
SpeedStep that results in the noise; realtime
applications like Photobooth are likely to be
inhibiting nap for latency reasons, but very unlikely
to be inhibiting SpeedStep.
I'm still trying to grok all this, so please humor me.
Based on the above, the speedstep state transitions are resulting in power fluctuations, leading to the whine? And the reason many don't find any whine in WinXP is because (speculation) it may not be doing appropriate SpeedStep transitions, resulting in additional heat (reported issue) and lower battery life in XP (but no whine)?
All that seems to make sense. The only thing that throws me off are the posts (potentially wrong) from folks claiming that they get BETTER battery life w/ XP (implying a more mature SpeedStep implementation in XP -- which is entirely possible), and they still have no whine (sounds impossible given everything above). Sorry for the long post, but from my understanding both can't be true, unless I'm completely misunderstanding the above. Can anyone provide insight?

So should I turn on Stamina mode always to extend battery life?

Hello eveyrone,
I was just hoping that you could help me understand how to efficiently maximize my battery life of my Z1.
I noticed that when STAMINA mode is turned off, the standby time decreases but the "standard" time usage is longer.
However, when STAMINA mode is off, standby time is longer (6-10 days), but the "standard" time usage is shorter.
How should I go about this? Should I always turn Stamina mode on to save battery? Or are there instances when I should deactivate Stamina mode to maximize my Z1's power? Why is this so?
Thank you.

Try the basic, repair your phone with SUS or PCC and check again
Update Service (SUS)
PC Companion (PCC)
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)

Extend battery life

I love my iphone. I had the original, now I upgraded to the 3g to take advantage of the gps capabilities of some of these apps. For example, Golf GPS apps, that tell you yardage on the course. Problem, average round is 4 hours, and 5 if you're waiting on every hole from slow players. Even with a full charge, these kinds of apps just kill the battery. I started with a battery 3/4 full, and made it about 12 holes before it was down to 10 minutes left on it. Any way I can extend that on the fly on the course to get that extra hour or two out of the phone?
Message was edited by: Jonny Apple Seed

http://store.apple.com/us/product/TV809VC/A?fnode=MTY1NDA0MQ&mco=MTA4Mzg5NDY
http://store.apple.com/us/product/TV652ZM/A?fnode=MTY1NDA0MQ&mco=MTA4MzkxMzg

Extend battery life through Restore?

Hi, my wonderful Mini is kind of getting low on the charges. Before handing it in to get the battery replaced - I read somewhere that you can do a restore (and all all the files on the ipod), and that this helps to get the battery to hold a full charge again.
I don't know whether this is true (neither can I find the instructions for that) - so, does anyone here knows anything about this?
Thanks!

All a restore does is to reload the iPod software and erase the contents, restoring the iPod to factory settings. I seriously doubt that this would affect battery performance, and indeed, I've seen no evidence to support that claim.
There's a lot of battery myths, and I suspect this is just one of them. This site helps dispel a few.
http://www.vsa.cape.com/~danh/ipod.htm

Another very good set of tips to extend your battery life

ALL,
From any screen press and HOLD the Home Button until the Task Manager appears. Then touch the words Task Manager. At the top of the next screen you will now see 4 choices. Lightly slide your finger from right to left and drag the entire 4 choices to the left and you will see Help...touch it.
Wa-La, there it is, Tips to Extend Battery Life.
Hope you like it and that it helps you. I particularly like tips 1 and 4, how about you.
JerryF

JerryF,
You need to write a book, "How to tweek your Droid: What the techies don't know"

IPhone 4S Battery Life: Best solutions and procedures for 1st time user: 1-Do you have a battery life issue (learn first what the usage time spec is about) 2-What can you try to remedy the situation without reading 500 pages of posts

What follows is a grouping of some of the most fruitful procedures - from what I've seen in the biggest battery life issue thread - and some background information and discussion for solving or improving the battery life with the iPhone 4S and may be applicable also to devices on which iOS 5.0/5.0.1 has been applied. Credit goes to the respective users who contributed this information to the forum and they should be commended for doing so. This is not a final listing. The goal here is to provide a first stop sort of knowledge base document for newcomers instead of having them perusing the never ending threads where the wheel is reinvented on every page...
Please don't post your questions, usage screenshots, or claims that it worked or not for you or anything here except PROCEDURES/DEBUG STEPS/SOLUTIONS or improvements to the procedures already listed here. Try to use point form and to be as concise and clear as possible. Hope all this helps.
Thank you and good luck!
General info and specs
First, take a look Apple's battery tips, info and specs(obligatory reading for all Iphone 4S users - read it once and for all):
http://www.apple.com/batteries/iphone.html
http://www.apple.com/batteries/
... you didn't read it? loll Always remember this i.e. the definition of "usage":
Usage: Amount of time iPhone has been awake and in use since the last full charge. The phone is awake when you’re on a call, using email, listening to music, browsing the web, or sending and receiving text messages, or during certain background tasks such as auto-checking email.
I'm still not convinced you read the links so here's what Apple has to say in terms of fine tuning your battery life:
Optimize your settings
Depending on how they are configured, a few features may decrease your iPhone battery life. For example, the frequency with which you retrieve email and the number of email accounts you auto-check can both affect battery life. The tips below apply to an iPhone running iOS 5.0 or later and may help extend your battery life.
Minimize use of location services: Applications that actively use location services such as Maps may reduce battery life. To disable location services, go to Settings > General > Location Services or use location services only when needed.
Turn off push notifications: Some applications from the App Store use the Apple Push Notification service to alert you of new data. Applications that extensively rely on push notifications (such as instant messaging applications) may impact battery life. To disable push notifications, go to Settings > Notifications and set Notifications to Off. Note that this does not prevent new data from being received when the application is opened. Also, the Notifications setting will not be visible if you do not have any applications installed that support push notifications.
Fetch new data less frequently: Applications such as Mail can be set to fetch data wirelessly at specific intervals. The more frequently email or other data is fetched, the quicker your battery may drain. To fetch new data manually, from the Home screen choose Settings > Mail, Contacts, Calendars > Fetch New Data and tap Manually. To increase the fetch interval, go to Settings > Mail, Contacts, Calendars > Fetch New Data and tap Hourly. Note that this is a global setting and applies to all applications that do not support push services.
Turn off push mail: If you have a push mail account such as Yahoo! or Microsoft Exchange, turn off push when you don’t need it. Go to Settings > Mail, Contacts, Calendars > Fetch New Data and set Push to Off. Messages sent to your push email accounts will now be received on your phone based on the global Fetch setting rather than as they arrive.
Auto-check fewer email accounts: You can save power by checking fewer email accounts. This can be accomplished by turning off an email account or by deleting it. To turn off an account, go to Settings > Mail, Contacts, Calendars, choose an email account, and set Account to Off. To remove an account, go to Settings > Mail, Contacts, Calendars, choose an email account, and tap Delete Account.
Turn off Wi-Fi: If you rarely use Wi-Fi, you can turn it off to save power. Go to Settings > Wi-Fi and set Wi-Fi to Off. Note that if you frequently use your iPhone to browse the web, battery life may be improved by using Wi-Fi instead of cellular data networks.
Turn off Bluetooth: If you rarely use a Bluetooth headset or car kit, you can turn off Bluetooth to save power. Go to Settings > General > Bluetooth and set Bluetooth to Off.
Use Airplane Mode in low- or no-coverage areas: Because your iPhone always tries to maintain a connection with the cellular network, it may use more power in low- or no-coverage areas. Turning on Airplane Mode can increase battery life in these situations; however, you will be unable to make or receive calls. To turn on Airplane Mode, go to Settings and set Airplane Mode to On.
Adjust brightness: Dimming the screen is another way to extend battery life. Go to Settings > Brightness and drag the slider to the left to lower the default screen brightness. In addition, turning on Auto-Brightness allows the screen to adjust its brightness based on current lighting conditions. Go to Settings > Brightness and set Auto-Brightness to On.
Turn off EQ: Applying an equalizer setting to song playback on your iPhone can decrease battery life. To turn EQ off, go to Settings > iPod > EQ and tap Off. Note that if you’ve added EQ to songs directly in iTunes, you’ll need to set EQ on iPhone to Flat in order to have the same effect as Off because iPhone keeps your iTunes settings intact. Go to Settings > iPod > EQ and tap Flat.
Usage specs for the 4S - http://www.apple.com/iphone/specs.html:
Talk time: Up to 8 hours (12.5% per hour drain) on 3G, up to 14 hours (7.1% per hour drain) on 2G (GSM)
Standby time: Up to 200 hours (0.5% per hour drain)
Internet use: Up to 6 hours on 3G (16.6% per hour drain), up to 9 hours (11.1% per hour drain) on Wi-Fi
Video playback: Up to 10 hours (10% per hour drain)
Audio playback: Up to 40 hours (2.5% per hour drain)
So a scenario of normal usage could be for example: 4 heavy hours of 3G internet browsing (66.4%), with one hour of call on 3G (12.5%) and 22 hours of standby (11%) = 100%
A battery life issue is a problem where the drain is really out of spec either during usage or standby or both. For example, multi-% per minute drain during usage or a 10% drain per hour during standby is problematic. Browsing the internet on 3G during one hour and losing 16-17% is not.
Apple's test methodology for claiming the specs:
http://www.apple.com/iphone/battery.html
Procedures
davidch tips (reset+full discharge recharge):
Go through these steps to address the battery after updating to iOS 5.0.1:
1. Reset all settings (settings app-> general-> reset)
2. Go through initial setup steps (lang, wifi, siri, enable location, etc) and choose setup as new phone (don't worry your apps, data, contacts, mail will still be there). Do NOT restore from iCloud or iTunes (It can copy back corrupt settings)
3. Turn off system location services timezone and iAd
4. Fully discharge battery (tilll it shuts off with the spinning wheel)
5. Fully recharge battery (overnight if possible)
In my experience this improves the Standby battery drain issue significantly in most cases. It reduces drain from 2-4% or more per hr to 0.5% or less. It has worked for many, many users now. If it does not work after a few try's you may have a real battery or hardware issue and should contact Apple. Good Luck!
ram130's variant of davidch i.e. additional steps:
Now using davidch original steps and attaching the tweaks I made to get me more usage. As shown on page 29.
Go through these steps to address the battery after updating to iOS 5.0.1:
1. Reset all settings (settings app-> general-> reset)
2. Go through initial setup steps (lang, wifi, siri, enable location, etc) and choose setup as new phone (don't worry your apps, data, contacts, mail will still be there). Do NOT restore from iCloud or iTunes (It can copy back corrupt settings)
3. Turn off system location services timezone and iAd
4. Fully discharge battery (till it shuts off with the spinning wheel)
5. Fully recharge battery (overnight if possible)
6. Disable Siri 'Raise To Speak' and REBOOT *( if possible use another camera to verify the                 infrared is off after the reboot).
7. Set emails, icloud and calendars to fetch. ** test. Mines on hourly.
8. If your in a no signal and your phone is saying "Searching..." even after 10mins, reboot while in that area and after 1-2min it should say "No Service". This mainly applies to Verizon customers and improve battery life in these areas.
9. *optional* Goto Settings > General > Network and you will see "Hotspot.." loading something, wait a few seconds and it should say "setup personal hotspot" then exit out.
* I notice a great improvement after disabling this and rebooting. This increased my "screen on" usage or at least helped it. Make the change.
** I have not tested push yet to narrow down the drain but I had this change on my phone. I believe exchange push is responsible for some stand by drain. As for icloud, haven't notice much of a difference. Just try it for a day. My email still came in fast most times. Again still testing, will report back on these..
buxbuster tips(wifi sync, iCloud):
These are my own tested workarounds that worked for my iPhone 4S and seemed to have worked for others as well :
Workaround number 1. Deselect wifi-sync in iTunes and press sync.
If that doesn't work try :
Workaround number 2 : Remove iCloud, reset network settings. ( I guess this won't work for you since you don't have it enabled ).
If both workarounds fail, you can always try to completely wipe your phone. That also solved some of the cases out there.
rolandomerida tips - i.e. buxbuster and additional steps:
Finally, I solved the syncing error loop. My contacts are syncing flawessly again between my devices and iCloud, and yes, the battery stopped draining, which is the main topic here.
I followed instructions from buxbuster (check his workaround a few pages up!) and an additional BIG step to restore contacts and syncing, as seen in a MacRumors forum.
This is what I did:
1. Make a backup of your Address Book, using the vCard option (or both, it doesn't hurt). Save it for later.
2. In your iPhone, delete iCloud account. When it asks, accept both: delete AND delete from my iPhone.
3. Reset network settings. The iPhone will restart, then will ask you to unlock the SIM card.
4.Turn Wi-Fi on.
5. Add the iCloud account again.
That's for Buxbuster's workaround. For some, it might work just like that. My iPhone repopulated from iCloud after step 5, but I still had that "server error" on iCloud. I had to do some extra steps, since my Mac was not syncing to iCloud and couldn't edit anything on my Mac or iCloud. Syncing back had to be fixed, too. If not, the syncing loop would continue from my iPhone, and the battery would drain awfully again.
1. In System Preferences -> iCloud, I turned Contacts off. I chose "keep on My Mac" those contacts, but I got an empty Address Book after a while. And a few minutes later, iCloud contacts were empty and my iPhone also. It is scary at first! Now, before importing that vCard backup...
2. Turn Wi-Fi off. This is important, since your contact-empty iCloud will attempt to wipe your Address Book from your Mac in seconds after importing.
3. Import your vCard backup to Address Book. Just drag it to your blank Address Book window; it asks if you want to import "x" number of cards. Of course, say yes.
4. Turn Wi-Fi on, and then iCloud contacts on again (System Preferences -> iCloud). It will offer to merge your newly populated Address Book with iCloud (which is empty at this point). It should upload every single contact to iCloud, and then to your iDevices. If not, a fifth step would be to import the vCard file to iCloud, but it shouldn't be necessary.
So, with iCloud syncing working correctly, there is no battery draining! Again, that was my particular issue.
I can't tell if this is the single answer to the widely spread battery draining problem, but it sure can be fixed with these workarounds, and yes, Apple should address the problem with a future update, for we affected customers don't need workarounds in the first place
This is the MacRumors discussion:
http://forums.macrumors.com/showthread.php?t=1256807
And dont' forget to check buxbuster's fix, video, and THANK him!
Miless tips (full 800mb release of 5.0.1 and sanitizing a restore):
As for 4S battery life. Try doing this,
1. Settings>Location Service ... disable all location services you do not need. In particularly Facebook because it drains the battery a lot.
Scroll down to the bottom at Settings>Location services>System Services ... Disable Setting Time zone, location based iAds, Diagnostic & Usage.
2. Settings>Notification>Calendar ... turn off the Notification Centre.
3. Settings>General>Reset ... do Reset All Settings. Doing this will not wipe out your iPhone. It will just Reset the network settings, location warning, keyboard dictionary, etc... but it will clear up some corrupted data there. Generally this will help.
Try these 3 steps first... if it still drains a lot, try the following,
4. Drain your battery down to 1%. Then charge it up using USB from PC ... not the charger. The charger output 1.0 A ( x 5V from USB ... you get 5W power). From PC, output is only 0.5A x 5V = 2.5W power. Charging is slower but trickle charge 4S helps the battery retain its charge better. I think it takes about 3-3.5 hours to charge full from USB/PC compared to slightly below 2 hours using iPhone charger.
If after doing the above still could not solve your battery issues (mine with iOS 5.0 was ok up to step 4, but not iOS 5.0.1).... plug you iPhone to a charger (any charger), from iPhone, access your iCloud ... set it up if you havent. Back up your iPhone data to iCloud. if you do not have enough storage (only 5GB is free), go to details and select the apps you need its data backup, choose only those you really need and leave those unnecessary ones out. Back up your camera roll to your PC/Mac manually as it could be too big to backup to iCloud.... once you have it setup, make sure you are on Wifi ... tap backup to iCloud from your iPhone. It will take a while if the file is huge.
Once backup to iCloud is completed, plug your iPhone to PC/Mac and launch iTunes 10.5.1 (make sure you have 10.5.1)
Click Restore. It will automatically initiate a download of iOS 5.0.1 ipsw for iPhone 4S. Wait for the whole process to finish, ie. download, restore software/firmware.
Once its done, do not set up your iPhone from iTunes. Set it up on your iPhone. Go through the selection. When prompted, select restore from iCloud (from your iphone backup earlier). Keep your iphone plugged into iTunes while restoring backup from iCloud. Because while restoring from iClouds, some data will be synced from iTunes if you plug in, e.g. music, video, etc... unless you bought these content from iTunes store. Apps will be downloaded from App Store from the cloud.
Once it's all done restored. Turn off your iPhone,.. and turn it on again.
Now, hopefully your battery wont be draining so fast anymore. Usually it wont after this. But you need to charge your battery at least 4-5 cycles to stabilize the charge on the battery. I dont know why... but battery life seems to get better and better for me after a few charge cycles after all the above work.
Good luck. Let us know if it works for you.
W. Raider tips (Sirii):
Bottom line for me of things that helped battery life are:
1. Turing off Siri and Rebooting the phone by holding the Home button and Top button down, ignoring the slider, until the phone shut down. (turn off Siri, reboot, and check top front of iPhone 4S against a lesser camera like the front-facing camera on an iPad2 - making sure the IR sensor is off)
2. Fully draining the battery, meaning using the phone until it shuts itself off from a drained battery and then recharging it to 100% about 4, maybe 5 times. I charged it both with a Mac and a wall charger.
Hope this is helpful!
Comments
jmm514 remarks (Twitter):
I may have found something. I had Twitter disabled in my notifications, but got a tweet today that popped up on my home screen. Didn't know I had this enabled. At the bottom of the Twitter notification settings is the home scrren toggle. Since disabling this, battery life seems better. Considering there is no setting for frequency of checking for tweets, it appears the phone is continually connecting to wifi to check for new tweets.
tmksnyder comments (notifications, corrupt data in iCloud):
For me, I found my iphone on wifi mysteriously connecting to my mac. I eventually narrowed it down to the Apple Move Trailers app which keeps a file in iCloud. The phone was trying to sync the file with the mac in the background even when the Movie Trailers app was closed (hitting the red x). Based on my macosx logs the iCloud process that was trying to sync was working directly between the phone and the mac without using itunes by connecting to an https address hosted on the phone. It was connecting every 3 minutes and failing (while phone was awake or awake during during a notification). I also found that iCloud control panel on OSX would error if I tried to delete the file. I fixed it by removing the App and doing a hard reset which stopped the sync. I probably could have turned off iCloud document sync in the phone but didn't think of that. My battery life has greatly improved while at home on wifi.    I am now at 28 hrs standby, 2 hrs 20 minutes of usage, and 68% battery. It was ok before where I could get 20-30 hrs standby and 6 -8 hrs usage. My usage today was phone calls, 3g surfing, and music via bluetooth in the car.
I also found even with Itunes iMatch, if I mass updated tages, art work etc, it would hit the phone on wifi even in standby. I was amazed.   Granted if I am not doing updates, Match won't hot the phone so this was a once in awhile event. I could drop my percentage by 5-10% in a matter of minutes when doing updates.   I think a lot of our problems are background processes, associated with iCloud, notification, and apps. More features means more battery.   I think the key thing is to keep track of what has recently been added or changed if battery life gets worse all of a sudden.   It may be an app that was recently installed and if possible you may want to completely remove it and not just quit it.
With twitter, i think it uses push notifications so it doesn't need to be running and actively poll on the phone. For instance , if i quit the mail app, i still will get mail notifications and can swipe the message and load mail. Apple Push Notifications servics maintain the connection to the phone and there are likely pings or connection checks that occur for the service on an os level not an app level. This minimizes the load so there arent a bunch of apps all runing and constantly checking. The notification service , if it is contacted from twitter or another service with data, will check the settings you have registered to the with the apple push service and send the notification to your phone. No matter what, there is a drain with notifications. M hunch is once one application is configured to receive notifications, connection checking occurs betwen the push service and the phone so it knows where it is on the network. If it is implemented correctly, these checks arent frequent if you are still and more frequent as you move. The other drain is for when the noification hits and is processsed. If i get 9 emails over night, my screen just popped up for 20 seconds or so to process each message using battery. I would even think that just go from low power to turning n the screen uses more juice than if the device was already on and i get the message. On nights I get no notifications, I see a 3 or 4 percent drop. On nights with a number of notifications, i have seen up to a 10 percent drop. Besides notifications, wifi sync and icloud will poll on the local network and use up battery if the host computer is on and running itunes or trying to sync a data file that is corrupt (which i had with the apple movie trailers app causing my phone to drain). For me turning off wifi sync and remving a corrupt file in icloud solved my battery issues and I get over 24 hrs of standby with 6 to 9 hrs of use and this is with all the normal location services and push serivices turned on.
See http://developer.apple.com/library/mac/ipad/#documentation/NetworkingInternet/Co nceptual/RemoteNotificationsPG/ApplePushService/ApplePushService.html for more info. I think it has a good overview of how the notifications work.

Well seems like that rumor of iOS 5.0.1 is finally gone the way of the dogs since developers got a beta of 5.1. So as stated earlier in the master discussion-> I suspect if you are filling up this thread with false post or creating a master set of links to various post that are unreliable you are wasting your time. Press is not going to touch the story due to poor or inaccurate sources which may be links from the master thread. This can include inaccurate information, combination of conflicting post or postings from users which may not own the device. Reputable press organizations have policies that require discloser and strict rules about what is a reliable source for a story. It is clear that many of the post in the master thread, which are links presented here are questionable.
Sorry to say that postings taken without any analysis of their totality have been propagated via various sites, for example sites such as http://www.2012federalbudget(dot)com. (Do not visit but I suspect that this is not the 2012 federal-budget site you would expect based on analysis of the records. There are plenty of sites like http://www.2012federalbudget(dot)com propagating questionable post in these threads.) One site for example in the discussion thread used a self signed certificate, the site had a log in to allow users to enter their OpenID. Seems many of these sites are pop and drop drupel configurations.
So remember this is how the really bad rumor of iOS 5.0.2 got started, the 5.1 memory leak issue, iCloud Issues, call quality, address book, etc.
Some of the postings have been very comical, I think the latest now is a dropbox issue. Seems that the length of the previous thread has resulted in various app engines of some proxy servers/tools reaching their limits.
So I would make sure to know the source of any information you link to. Make sure you avoid entering any information to outside links such as OpenID or Apple ID, these are big prize items for anyone with malicious intent. If you have issues and are a valid user contact APPLE CARE. (Note link is using McAfee Secure Short URL Service, and is https.)
http://mcaf.ee/ricdt
The original solution still represents a high level of success for users having any battery issues.
Install 5.0.1 on your iPhone 4s. Some users posting they are still using older versions, bad fake serial numbers, etc.
Make sure your device can run iOS 5.0.1 and is not altered.
Make sure you use a new Sim, not some cut down version which many users admit to doing. (Again, worth confirming what people are posting.)
Reset the device doing a hard reset and software reset.
Let battery drain and then charge for the full cycle, which is 24 hours.
I think you will find you will get the battery usage that APPLE has stated for the device.
Best of luck, stay safe and thanks

HOW TO MAXIMIZE YOUR LAPTOP'S BATTERY LIFE

Hi all,
I had this bad experience of this wide problem in laptops, battery failure. It happens almost just after your warranty expires many will agree, funny & true..battery stops charging, shows less than 100% or 0% charge no matter how you try to charge it..etc. Also many complain that the battery shows only remaining charge time, and not the time remaining (read 9th tip below).
Though Mark, Andy, vkyr, nonny, jhem, bill, myles and other admin guys are here to help on this forum, I thought of writing this based on my own experience of these batteries till date..I had compiled a few tips and information for dummies about the use of battery here which might help you to extend battery life:
NOTE to moderatos--please check / modify / add / edit in the following if you find any wrong information.
NOTE to all -- These tips in no way will harm your system, except the 9th tip and also if you remove battery without shutting down laptop
All are welcome to add any new tips or corrections.
1. Never discharge battery to 0%. Always, ALWAYS let battery discharge to a lower limit of up to about 5 to 10%.
2. To run it or not on AC supply without battery If you use laptop most of the time at home or a place where there is a continuous (= uninterrupted) power supply, then simply remove battery from laptop and run laptop on AC power. If you are doubtful about current surge in AC supply, use a surge protector or a UPS (uninterrupted power supply) unit, which doesn't cost much. But be prepared, sometimes you may lose the data which is not saved, due to any accidental interruption. As [Bill] pointed out there might be a performance degradation due to power failure.This is not recommended if you are unsure of power supply.
3. If you use AC power most of the time, then store battery with 30 to 50% (about 40% optimum) charged condition in a dry, away from any magnetism. At least once in a week or two weeks, run the laptop on only battery supply, let discharge it to about 10%, connect to AC supply, charge battery to 100%. Shut down, disconnect supply, remove battery from laptop and then use AC power supply as usual again.
4. If you are running out of remaining battery time, then instead of shutting down PC, hibernate it ( you need to enable hibernation before through power settings in control panel). Shutting down takes more time than hibernation and without saving anything, you can resume your work after hibernation. After hibernating, even if you remove battery, it won't lose any data and will resume once you connect laptop to a power supply.
5. Use power schemes (power management profiles), modify options available in power options under control panel in windows according to your usage & habits. Instead of using a blank screensaver or a screensaver which looks cool, turn OFF monitor, use lenovo power management options or windows power schemes to do this.[Tom&Wjli2]
6. When running on batteries, to save power - reduce brightness of screen (using keys Fn + F10 to reduce, Fn + F11 to increase), mute volume & turn off any unnecessary devices that you are not going to use like (thanks to [Nicolas])bluetooth / modem / plug&play monitor / network adapters(wireless/ethernet/lan/1394) / PCMCIA adapter. Use 'control panel->system->hardware->device manager' to turn these devices on and off.
Changing color schemes to dark or black colors doesn't save power in case of LCDs. (http://savingenergy.wordpress.com/2006/11/21/saving-energy-one-monitor-at-a-time/)
7. Whatever you try, a battery has a specific life time (no. of charging/discharging cycles), and it discharges slightly/continuously over a long period even when not in use. So if your battery is giving problems after about 3 years of service, then it is time for its replacement. Don't assume that if you don't use battery more often, it will last longer, it may usually, but battery failures are unpredictable.
8. If your battery has started to show problems, it will most likely fail sooner or later. Consult experts if battery is under warranty, else buy a new one.
9. Either use lenovo's default program or you might try a program like Notebook Hardware Control (http://www.pbus-167.com/ ) to monitor your power & hardware / temperature. This program shows remaining battery time once you modify advanced options for battery. Also it shows various temperatures for CPU/HDD and warns you if temperature reaches preset limit.
Caution: though this program allows, don't try to modify voltage settings under advanced options, it can harm to your system.
Added:
10. Never run a hot laptop or a hot battery. It damages the battery/laptop, so be sure to keep temperatures within normal range.(below 140 F or 60 deg C).
11. There are few more good/advanced points added by Tom on Page 2.
Message Edited by iamdh on 04-11-2008 09:24 PM
Message Edited by iamdh on 04-11-2008 10:07 PM
Message Edited by iamdh on 04-11-2008 10:08 PM
Message Edited by iamdh on 04-22-2008 05:21 PM
Message Edited by iamdh on 05-31-2008 05:50 PM
Message Edited by iamdh on 05-31-2008 06:06 PM
3000 N100-0768DKU
XP Home 5.01.2600 SP2
Ubuntu 8.04(hardy)
Solved!
Go to Solution.

Dear iamdh,
Thanks for your answer and your update of the main post. I also read the various interesting articles you mentioned.
Now, I would like to submit to you these interesting questions :
Question 1 : Please do the following test : Open Paint, enlarge to full screen, set image size at least the size of your LCD (e.g. 1500 x 1200 dots) and use bucket tool to fill the whole image in pure black. Now, go to control panel, display, screensaver tab, and select Blank screensaver and test it with the View button. DO YOU SEE A DIFFERENCE between the black screen in Paint and the blank screen of screensaver ?
I don't see any difference (I use a vaio A517S laptop with high brightness LCD), so the conclusion might be that the blank screensaver uses up the same energy than a black color screen. A 2nd experiment leads to the same conclusion more conclusively : View again the "blank" screen (in screensaver tab, View button) and play with the Fn Keys to change brighness. You will notice that that it is impacted by brightness level which means the blankscreen is NOT a real "blank". WHY IS IT IMPORTANT ? Because, if choosing the Blank screensaver uses up the same energy as a black screen, AND because the black screen doesn't make any difference with a white screen on a LCD (remember the paper you found), then, why choose the Blank screensaver !!? Or, is it the fact that colors don't make any difference with LCD which is wrong !?? At that stage, I only ask. It is logic, it is one or the other, isn't it ? Any comments welcome.
Question 2 : You remember that energy transforms into various forms : light, temperature, strength, movement, etc... Now, let's come back to LCD monitor : IF a black full screen and a white full screen uses up the same energy (youy remember the paper http://savingenergy.wordpress.com/2006/11/21/saving-energy-one-monitor-at-a-time/), then, there is a interesting point : Because the white screen gives more light than the black (you can check that in the middle of the night using your laptop as a spotlight torche !), it means that the black uses up its energy into an other form. ...What could it be, other than temperature ? LET'S PUT IT AGAIN DIFFERENTLY : The black screen and the white screen use up the same energy, but why it is used for brighter light with the white, it is used for higher temperature with the dark. WHY IS IT IMPORTANT ? Because higher laptop temperatures damage batteries quicker, then it means that we should avoid dark colors and prefer light colors in our windows settings. .. any comment welcome
Really, the central point of discussion is the fact that electricity LCD consumption is not impacted by colors, even white or black. Has it been really double checked by many ? A story to follow..
Message Edited by Nicolas on 04-24-2008 01:34 AM
Message Edited by Nicolas on 04-24-2008 01:35 AM

Why is my iPod running slow, uses nearly 600MB of space that I'm not using, and have short battery life?

I have owned an iPod touch for about a month now and I having some problems with it. On occasion, my iPod is running very slowly, even when I keep my multitasking bar empty, the native apps such as the App Store, Music, Videos, etc. lag a lot whenever i try to access content. This was not the case for me when I was running iOS 4, in which my iPod ran extremely fast and had great battery life. I most of the time keep my wireless turned off (to be specific, i turn on airplane mode approx 3/4 of the time) along with my brightness turned all the way down. Any suggestions?
I also have another concern with my storage space. I have an 8GB 4th Generation, and whenever I plug it into iTunes, I notice nearly 700MB of space that I am not using on my iPod, I have gone through all of the data and calculated that the 700MB of space that iTunes classifies as "other", i am not using this storage space. Is there anything that I can do about this or do I have to erase everything and restore to get rid of this?
Thank you for taking the time to read my question, and if you can, please answer.
Thanks.

- iOS 5 does slow the iPOd. Periodically powering off and then back on helps since it free up memory that apps do ot release. The iPod only has 256 MB of memeor and low memory slows the iPod.
- iOS 5 also increases battery drain. I leave mine in airplane mode when not using wifi or BT. Also see:
iPod: How to extend battery life
- An other of about 1/2 GB is normal and expected. to get it down you need to restore your iPod. Sometimes restoring from backup works but sometimes a restore to factory defaults/new iPod is required.

Extending battery life

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