Is battery life dependant on type of encoding used?

I have a new 30 GB ipod, and with it fully charged, it appears to play music for about 6 hours. I thought it was supposed to last 14 hours before konking out.
Does the method the music is stored effect the battery life? I am using the non-compressed AIFF for all my songs, so my question is does it use more battery life to play a song in AIFF versus if it was in a compressed format?

If I remember the size correctly, the iPod has a cache of 9MB. When it plays an average sized compressed song it can usually load all of it into the cache. With file larger than 9MB it has to access the hard drive more often and will draw more power.

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Is it normal for iPhone 4S to lose 1% battery life after 2-3 minutes of using?

Is it normal for iPhone 4S to lose 1% battery life after 2-3 minutes of using? So in 2 hours, 24 minutes usage and 15 hours, 17 minutes in standby mode, the battery became 68%...

sounds plausable
also you can't really 100% trust it's batt% batteries are an analog technology the only thing the iphone can judge how much batt is left is by measuing amp amount the batt is producing and then over time estimating how long before it's zore
but anyway Its not wise to not put a battery for charge before bed when it's 12%
if your reason is you think it's good for batteries to be empty before charging then you believe in a myth and in the process damaging the battery in your ios device

Normal battery life for two-year-old iPad?

My first iPad is nearly out of warranty. According to the Apple store 'Genius' app (the little hand held device they seem to look at a great deal), my battery is "normal".
They couldn't define in real-world terms what "normal" was. Does anyone know - is it five hours - eight hours (which would be close to the 80% rule listed here: http://www.apple.com/batteries/ipad.html)
Since I don't have the devices they use to measure "normal", what would you folks suggest as an argument starting-off point?
Here's what I did: pulled up CineXPlayer and looped a 60 minute TV show. I left wi-fi ON, set brightness to auto, and turned the volume down to almost zero, since I wanted to sleep.
With this test, I will get nine hours before the iPad shuts down.
Would I get less if the volume was at say 75%?
Would I get more if the Wi-Fi was turned off?
How many hours at what concoction should be used as a standard for "normal"?
As much as I don't mind paying $99 sometime in the future for a fresh unit, if the battery is out of warrantied specs now, while my warranty is still active...well, that's the kind of Apple-care I would hope for.
PS - I HAVE updated to 5.1.1 and the latest firmware, restored the iPad to factory, then restored from my backup.
Cheers

During the warrranty coverage period, Apple will replace the battery if it drops below 50% of its original capacity. If it is out of warranty, Apple offers a battery replacement for $99, plus $6.95 shipping, subject to local tax.
The specs for the iPad 2 state that you can expect
Up to 10 hours of surfing the web on Wi-Fi, watching video, or listening to music
Up to 9 hours of surfing the web using cellular data network
The fine print on http://www.apple.com/ipad/ipad-2/specs.html says:
Testing conducted by Apple in February 2012 using preproduction iPad units and software. Testing consisted of full battery discharge while performing each of the following tasks: video playback, audio playback, and Internet browsing using Wi-Fi or cellular data network. Video content was a repeated 2-hour 23-minute movie purchased from the iTunes Store. Audio content was a playlist of 358 unique songs, consisting of a combination of songs imported from CDs using iTunes (128-Kbps AAC encoding) and songs purchased from the iTunes Store (256-Kbps AAC encoding). Internet over Wi-Fi and cellular data network tests were conducted using dedicated web and mail servers, browsing snapshot versions of 20 popular web pages, and receiving mail once an hour. All settings were default except: Wi-Fi was associated with a network (except for Internet browsing over cellular data network); the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off. Battery life depends on device settings, usage, and many other factors. Battery tests are conducted using specific iPad units; actual results may vary.

Battery Life....Browsing

Folks,
Been using the iphone very happily now for 3 weeks. The battery life is great when listening to music, making calls, watching videos etc. The ONLY time my battery life just gets drained is when I'm browsing using safari or when I use google maps. I suppose anytime I use the Wifi or Edge network. And its pretty drastic, not even close to the 6 hrs that apple suggests!
does anyone else have this issue? Or is this even not possible that the phone would suck an extraordinary amount of battery power while using the internet?
Thanks!
FYI - Wifi and Bluetooth are always on, never turned off.

Copied from this link.
http://www.apple.com/iphone/specs.html
Internet over Wi-Fi: Testing conducted by Apple in May and June 2007 using preproduction iPhone units and software. Internet over Wi-Fi testing conducted using a closed network and dedicated web and mail server, simulating browsing to 20 popular URLs and checking mail once an hour. All settings were default except: Call Forwarding was turned on; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off; WPA2 encryption was enabled. Battery life depends on the cellular network, location, signal strength, Wi-Fi connectivity, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary. Internet over EDGE: Testing conducted by Apple in May and June 2007 using preproduction iPhone units and software. Internet over EDGE testing conducted over a 1900MHz EDGE, using a dedicated web and mail server, simulating browsing to 20 popular URLs and checking mail once an hour. All settings were default except: Call Forwarding was turned on; the Wi-Fi feature Ask to Join Networks and Auto-Brightness were turned off. Battery life depends on the cellular network, location, signal strength, EDGE connectivity, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.

Battery life on C2D macbook pros?

anyone know if its any good?

According to Apple:
15-inch MacBook Pro
60-watt-hour lithium-polymer battery (with integrated charge indicator LEDs) providing up to 5 hours of battery life(1)
17-inch MacBook Pro
68-watt-hour lithium-polymer battery (with integrated charge indicator LEDs) providing up to 5.5 hours of battery life(1)
(1) Battery life depends on configuration and use.

Battery life tips?

guys & gals,
reports of substandard battery life are a common theme on these forums. I need to know if my white box replacement iphone 3g (yes, already - and I'm only 2 weeks into the service!) needs add'l servicing.
right now, i'm only getting 4hr 31 min usage, 1day 6hr standby on a full charge. i set the brightness to ~25%, sound to ~40%, push once an hour, 3g and wifi off, handful of txt, handful of brief ( <20 minute) phone calls.
what to do?

Regarding Push, Push is either on or off for email, contacts, calendars, and bookmarks.
If you have automatic check for new messages set to every hour, you have Fetch access enabled for your email account or accounts.
I assume you have checked this link?
http://www.apple.com/batteries/iphone.html
Copied from the footnotes at the bottom of the page.
+Battery life depends on the cellular network, location, signal strength, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.+
Less than 20 minutes total of phone calls, or a number of phone calls less than 20 minutes each?
And no web browsing during this time?

OG Droid Razr battery life

I have an original Droid and since I am not a big cellphone user I have never had a problem with battery life. I am just wondering if the Razr has similar battery life. I know the Maxx just came out but I am not sure if I would need the extra battery life. Thanks for any advice.

Yes, the battery life isn't the greatest with smartphones.
As a reminder,
Battery life depends on the network, signal strength, temperature, features and accessories used.
It is common for batteries to be warm from use or charging.
Tips for extending battery life
Avoid exposing the battery to extreme heat and cold.
For the first 3 charge cycles, fully charge the battery overnight and allow it to fully discharge before recharging (battery conditioning).
Charge and re-condition a battery after an extended idle period.
A Lithium-ion battery may be damaged by extensive overcharging (continuously on a charger for more than 24 hours).
Use the battery. If possible, avoid letting your battery sit idle for long periods of time.
Use only the phone options and accessories that are really needed.
Here are some tips that will help extend the battery life on your Droid Razr.
I also make sure I use my smart actions to help with battery life. I make sure my Razr is in sleep mode when I sleep.
Hopefully, these tips/tricks will help you with the battery life on your Razr and even the Razr Maxx!
Tamara H.
Follow us on Twitter @VZWSupport

Prolonging battery life

I bought an 11 inch MacBook Air a few days ago. I find the battery life isn't as long as with my other portable Macs, I just did a test, keeping the MacBook Air on, not letting it sleep or energy save, running Mail and iCal and occasionally using Safari, with the screen light about three bits along so not too bright and the keys not illuminated at all - the battery lasted 5 1/2 hours. I gather that is is quite acceptable for this MacBook Air as it's so small. My question concerns how to keep my battery life good. I normally use my computer at home, I simply want the ability to take it out easily and to take to different rooms in the house.
Should I run the MacBook Air on the plug almost always ? Or should I run it on battery whenever it gets charged fully and then plug it in when it's nearly empty ? Or doesn't it matter one way or the other ?
I note from Apple that there is no need to calibrate this type of battery - http://support.apple.com/kb/HT1490 - but there's no advice about how to prolong the battery life.
Anne

The general rules are, use the battery just when you need to, but do some periodic deep cycling to keep the battery in shape.
Here is a tech article from Apple that give some basic guidelines.

Satellite M50-164 and Battery life

Battery power only lasts 1 hour tops. Is this normal, laptop only 2 years old.

Only 2 years!!! Sorry buddy but 2 years for mobile computer is long period of time. After 2 years battery can be defective, notebook can be full of dust and so on.
So, after 2 years is normal that battery hasnt so much poweras new one and 1 hour is OK time.
The question is what you do with it: watch DVD move, play a game or just write mails. As you know battery life depends on notebook usage.

CMOS battery life expectancy on VXIpc-872B

Hello,
I work for Raytheon. We are supporting a subsystem that consists of a VXI chassis with a National Instruments VXIpc-872B as the controller. There are currently between 20 and 30 of these controllers that have been procured from National Instruments. Can you tell me what the battery life expectancy is for the Tadiran TL-5186 CMOS battery as used in the 872 VXIpc controller? We need to provide this information to our customer (and yours) for use in on-going maintenance support.
Thank You,
Dan Nichter
[email protected]

Howdy dannic,
Short answer: The short answer is that the CMOS battery has a shelf life of 10 years.
Longer answer: Motherboards draw power from the CMOS battery to retain BIOS settings, DateTime clock, etc, while the system is turned off. Having said that, the battery life depends upon how you use the VXI controller. If
the VXI controller is turned on all the time, then the battery life will be
extremely long because the CMOS battery isn't being used. However, if the VXI controller is turned off all the time, then the
battery use will be much higher, and the battery life would be
shorter.
Overall, the mean time between failures on CMOS batteries is also about 10 years, and that includes battery life and any
other possible malfunctions. So the
batteries should last for a long time, but it is too hard to specify
further than that because of how dependent the battery life is on the
system configuration and usage. If you would like to implement a
battery replacement rotation program, you should be extremely safe
replacing them every 5 years or so.
Here's an additional reference you might find handy, if not for posterity's sake:
KnowledgeBase 2JIGCU00: Information about the Lithium Battery in the VXIpc-770/870B Controllers
I hope this helps!
Message Edited by pBerg on 05-02-2008 01:08 PM
Message Edited by pBerg on 05-02-2008 01:09 PM
Warm regards,
pBerg

Battery Life - Advice

Hi all,
Needing a little bit of advice - not sure if I am doing something wrong.
When I chose my MP3 player, I originally didn't want an i-Pod due to the fact I'd heard the battery life was rubbish. When we went to the shop to buy the Sony MP3 I wanted, we were basically talked into the i-Pod by a very enthusiastic salesman who was a hardcore i-Pod fan.
I've got the new 30gig video i-Pod and he told me that although it advertises around 20hrs battery life he said I could ideally expect between 6-10hrs of CONTINUOUS PLAY on the battery, which was fine.
However I am finding I am getting approx 1.5hrs of continuous play at the very most before my battery goes into the red from full.
Is this due to something I am doing wrong, or are all i-Pods generally like this? Or do you think its a problem with mine?
Any advice would be appreciated!!

From new, the iPod battery can take time getting to full potential. There are a lot of factors that affect battery usage such as what size your music files are, how often you use the click wheel or the backlight etc. As far as battery life goes, the hours Apple quotes are based on continual play of music files, AAC 128kbps file format, no backlight and no access via the scroll wheel during play. How long you get from your battery really depends on how you are using your iPod.
Have a look at these pages:
Battery FAQ
Tips and tricks to get the most out of your iPod's battery
Improve your iPod's battery performance
Accurately determine your iPod battery life
Lithium-Ion Batteries
Common Sense IPOD Battery Pointers
About the Battery charge status icon
Hope some of this helps.

HDD adaptor vs battery life...?

Hi guys,
Pardon me if my question have been discussed before, could not locate any threads...
I am thinking of buying the HDD adaptor for my T410 so that I can place a 2nd HDD in the optical drive, thought of putting in 1Tb. My question is, how much battery life will be affected if I go that direction?
Any inputs will be greatly appreciated
omar
Solved!
Go to Solution.

Generally it will drain as much as relugar HDD inside. Usually going to have impact about 30-60 mins battery life - depending on usage of that HDD.
7200rpm HDDs drain more and often are more loud and definitelly get a bit more hot than 5400 prm. Therefore I would suggest to with 5400rpm HDD.
Jan Solar
Product Marketing
(not a technical support)
http://blog.lenovo.com/author/jsolar/

Does anyone know what's up with the iPhone 4s' battery life? Some days it last a long time and other days it drains extremely fast.

Does anyone know what's up with the iPhone 4s' battery life? Some days it last a long time and other days it drains extremely fast.

Not to point out the obvious, but battery life depends very much on what is running and how much the device is being used.
If the battery lasts longer on a day you make no phone calls, but lasts less the day you make 5 hour long calls, this is to be expected.
If however the iPhone has the same level of use on both days, with different power consumption, this would infer a background process (or App) is trying to do something (connecting to server or creating a back up etc).
I switched off all thrid party apps from being included in my iCloud backup, which saves a huge amount of space on the cloud and allows the back up to take barely a couple of minutes.
Battery life seems ok so far on my 64GB 4S (Bluetooth on, Wi-Fi on, Location Services on, Push notifications on, Screen set to just under half brightness with Auto Adjust on)

Battery life on air 11"

3 months old air, new apple user
battery lasting no more than 3 hrs
this is what i see:
Informazioni sul modello:
Numero di serie: C010395037EDCMHAR
Produttore: DP
Nome dispositivo: bq20z451
Pack Lot Code: 0000
PCB Lot Code: 0000
Versione firmware: 0301
Revisione hardware: 0001
Revisione cella: 0175
Informazioni sulla carica:
Carica rimanente (mAh): 1180
Carica completa: No
In carica: No
Capacità a carica completa (mAh): 4382
Informazioni sulle condizioni della batteria:
Conteggio cicli: 91
Condizione: Normale
Batteria installata: Sì
Amperaggio (mA): -364
Voltaggio (mV): 7384
any advise from seasoned applers?
thanks
L

travelarian wrote:
Battery life depends on a lot of things like usage, screen brightness, apps, etc.
I get about 5 hours with brightness halfway and regular computer use: lots of web browsing, text editing, minor image adjustments, etc.
With the brightness all the way up it will go down to 2-3 hours.
My experience also. Screen brightness seems to have a significant impact. Also, see the current thread on the impact of running Flash.

Why doesn't the Macbook Pro's battery life last?

Why doesn't the Macbook Pro's battery life last anywhere near 5 hours, as advertised? This is my second one and it lasts 2. It's false advertising, and Apple doesn't seem to making a big deal or know anything about it, which i'm sure they do. Since their general practice is to deny problems exist in all their products, i'm here to make it known that the most recent Macbook Pro has a severe battery issue and it needs to be addressed.
I'm running OS X 10.8.3, Bluetooth is off, and haven't installed any third party software.

My MacBook Pro is over a year old and still gets 2.5 to 5 hours, depending on how intensively my application activity is hitting the CPU and disk. Remember that battery life depends on usage and component loads. You could get 1 hour editing HD video since it would hit all cores and slam the disk constantly, or 8 hours in a cabin in the woods with wifi and Bluetooth turned off, only writing text files, and with the backlight turned down and no disc in the drive. You should check Activity Monitor to make sure you don't have some processes using unusually high amounts of CPU for long periods of time (like browser tabs running Flash ads in the background, chewing up CPU and battery power without even being seen).
Like mende1 says, there are not huge numbers of Mac users getting only 2 hours, or the world would have heard about it by now and MacBook sales would be down. If you are only getting 2 hours there is something going on local to your machine or usage habits.
Terry Mele wrote:
Since their general practice is to deny problems exist in all their products
That's not strictly true. Apple has often announced updates or repair/exchange programs to address various problems that had come up over time. Maybe not always, but it does happen. They also have often helped me and my friends when we brought in Macs that were out of warranty and had problems. They had no legal obligation to work on our Macs for free, but they did anyway.

Is battery life dependant on type of encoding used?

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