Keeping iphone plugged in to power (laptop or AC) to preserve battery...
I use my Iphone at least 5-7 hours a day. Therefore, my theory is that I should keep the Iphone plugged into USB laptop (or AC--wall) frequently in order to extend the life of the battery. I understand that I need to keep the battery active (give it excercise--so to speak) weekly, but otherwise doesn't it make sense to keep the iphone connected to power (USB or AC) as much as possible. Otherwise I could easily cycle the battery 400x in a single year.
Does anyone agree or disagree? Any personal experience to support or refute my theory?
Thanks much
Yes, it's a good idea not to keep it in the charger all the time, but it's also good not to let the battery completely drain.
Read this from BatteryUniversity.
http://www.batteryuniversity.com/parttwo-34.htm
Dave M.
MacOSG Founder/Ambassador An Apple User Group iTunes:MacOSG Podcast
Creator of 'Mac611 - Mobile Mac Support' (designed exclusively for an iPhone/iPod touch)
Similar Messages
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Whats better for my mbp 2013 retina in the long run? Keep it plugged in as much as possible or letting the battery hit 10% and then recharge it?
Odd you ask that, since both are HORRIBLE, ... especially often draining your battery low.
General consideration of your MacBook battery
Contrary to popular myths about notebook batteries, there is protection circuitry in your Macbook and therefore you cannot ‘overcharge’ your notebook when plugged in and already fully charged.
However if you do not plan on using your notebook for several hours, turn it off (plugged in or otherwise), since you do not want your Macbook ‘both always plugged in and in sleep mode’.
A lot of battery experts call the use of Lithium-Ion cells the "80% Rule", meaning use 80% of the full charge or so, then recharge them for longer overall life. The only quantified damage done in the use of Lithium Ion batteries are instances where the internal notebook battery is “often drained very low”, this is bad general use of your notebook battery.
A person who has, for example, 300 charge cycles on their battery and is recharging at say 40% remaining of a 100% charge has a better battery condition state than, say, another person who has 300 charge cycles on their battery and is recharging at say 10-15% remaining on a 100% charge. DoD (depth of discharge) is much more important on the wear and tear on your Macbook’s battery than the count of charge cycles. There is no set “mile” or wear from a charge cycle in specific. Frequent high depth of discharge rates (draining the battery very low) on a Lithium battery will hasten the lowering of maximum battery capacity.
All batteries in any device are a consumable meant to be replaced eventually after much time, even under perfect use conditions.
If the massive amount of data that exists on lithium batteries were to be condensed into a simplex, helpful, and memorable bit of information it would be:
1. While realistically a bit impractical during normal everyday use, a lithium battery's longevity and its chemistry's health is most happy swinging back and forth between 20% and 85% charge roughly.
2. Do not purposefully drain your battery very low (10% and less), and do not keep them charged often or always high (100%).
3. Lithium batteries do not like the following:
A: Deep discharges, as meaning roughly 10% or less on a frequent basis.
B: Rapid discharges as referring to energy intensive gaming on battery on a frequent basis (in which case while gaming, if possible, do same on power rather than battery). This is a minor consideration.
C: Constant inflation, as meaning always or most often on charge, and certainly not both in sleep mode and on charge always or often.
From Apple on batteries:
http://www.apple.com/batteries/notebooks.html
http://support.apple.com/kb/HT1446
"Apple does not recommend leaving your portable plugged in all the time."
Keep it plugged in when near a socket so you keep the charging cycles down on your LiPo (lithium polymer) cells / battery, but not plugged in all the time. When not being used for several hours, turn it off.
DoD (depth of discharge) is far more important on the wear and tear on your Macbook battery than any mere charge cycle count. *There is no set “mile” or wear from a charge cycle in general OR in specific. As such, contrary to popular conception, counting cycles is not conclusive whatsoever, rather the amount of deep DoD on an averaged scale of its use and charging conditions.
(as a very rough analogy would be 20,000 hard miles put on a car vs. 80,000 good miles being something similar)
*Contrary to some myths out there, there is protection circuitry in your Macbook and therefore you cannot overcharge it when plugged in and already fully charged
*However if you don’t plan on using it for a few hours, turn it OFF (plugged in or otherwise) ..*You don’t want your Macbook both always plugged in AND in sleep mode (When portable devices are charging and in the on or sleep position, the current that is drawn through the device is called the parasitic load and will alter the dynamics of charge cycle. Battery manufacturers advise against parasitic loading because it induces mini-cycles.)
Keeping batteries connected to a charger ensures that periodic "top-ups" do very minor but continuous damage to individual cells, hence Apples recommendation above: “Apple does not recommend leaving your portable plugged in all the time”, …this is because “Li-ion degrades fastest at high state-of-charge”.
This is also the same reason new Apple notebooks are packaged with 50% charges and not 100%.
Contrary to what some might say, Lithium batteries have an "ideal" break in period. First ten cycles or so, don't discharge down past 40% of the battery's capacity. Same way you don’t take a new car out and speed and rev the engine hard first 100 or so miles.
Proper treatment is still important. Just because LiPo batteries don’t need conditioning in general, does NOT mean they dont have an ideal use / recharge environment. Anything can be abused even if it doesn’t need conditioning.
Storing your MacBook
If you are going to store your MacBook away for an extended period of time, keep it in a cool location (room temperature roughly 22° C or about 72° F). Make certain you have at least a 50% charge on the internal battery of your Macbook if you plan on storing it away for a few months; recharge your battery to 50% or so every six months roughly if being stored away. If you live in a humid environment, keep your Macbook stored in its zippered case to prevent infiltration of humidity on the internals of your Macbook which could lead to corrosion.
Considerations:
Your battery is subject to chemical aging even if not in use. A Lithium battery is aging as soon as its made, regardless.
In a perfect (although impractical) situation, your lithium battery is best idealized swinging back and forth between 20 and 85% SOC (state of charge) roughly.
Further still how you discharge the battery is far more important than how it is either charged or stored short term, and more important long term that cycle counts.
Ultimately counting charge cycles is of little importance. Abuse in discharging (foremost), charging, and storing the battery and how it affects battery chemistry is important and not the ‘odometer’ reading, or cycle counts on the battery.
Everything boils down to battery chemistry long term, and not an arbitrary number, or cycle count.
Keep your macbook plugged in when near a socket since in the near end of long-term life, this is beneficial to the battery.
In a lithium battery, deep discharges alter the chemistry of the anode to take up lithium ions and slowly damages the batteries capacity for the cathode to transport lithium ions to the anode when charging, thereby reducing max charge levels in mAh. In short, radical swings of power to lithium cells disrupts the chemical ecosystem of the battery to hold charges correctly which likewise impedes the perfect transfer of lithium ions both in charging and discharging. In charging your lithium battery, lithium ions are “pushed uphill” (hard) to the anode, and discharged “downhill” (easy) to the cathode when on battery power. Deep discharges, damages this “upward” electrolyte chemistry for the battery to maintain a healthy charge and discharge balance relative to its age and cycles.
Optimally, in terms of a healthy lithium battery and its condition, it is most happy at 50% between extremes, which is why low-power-drain processors such as the Haswell are ideal on lithium battery health since a partially charged battery with a low-drain processor has, in general, much more usage in hours
Battery calibration, battery memory, battery overcharging, battery training, …all these concepts are mostly holdovers from much older battery technology, and on older Apple portable Macbooks ranging from early nicads, NiMh and otherwise; and these practices do not apply to your lithium battery and its smart controllers.
Calibrating the battery on older Apple portable Macbooks with removable batteries.
http://support.apple.com/kb/PH14087
There is no calibration of current Apple portable Macbooks with built-in batteries.
http://support.apple.com/kb/ht1490
There is no battery calibration with current Apple portable Macbooks with built-in batteries. Lithium batteries have essentially a 0-‘memory’, and all such calibration involve the estimations fed to the system controller on the SOC (state of charge) of the battery over long periods of time as the battery degrades. The software based battery controller knows the battery's characteristics, or SOC and adjusts itself. This is why there is both no need and purpose to periodically deeply drain your macbook battery, since it doesn’t affect the characteristics of the battery, and further still deep discharges are something you should not do on purpose to any lithium battery.
From BASF: How Lithium Batteries work
https://www.youtube.com/watch?v=2PjyJhe7Q1g
Peace -
Should I keep iPhone plugged in all day or is that bad for it?
.. i.e. will that overcharge or hurt it in any way?
ThanksJust to expand on Ron's and Glor's answers, not only is leaving it plugged in frequently not bad, it's actually good, in that you'll put fewer cycles on the battery over time, which will prolong the battery lifespan. Lithium batteries do need to be used to maintain health, but the best usage is frequent and light (i.e. few deep discharges). Leaving it plugged in most (but not all) of the time is beneficial (just not necessarily practical for most mobile phone users).
Any lithium battery is good for 400-500 charge cycles, or ~3 years, whichever comes first.
You can learn more from the following links:
http://www.apple.com/batteries/
http://www.apple.com/batteries/iphone.html -
my iphone 5 randomly shut off and when I plugged it into my laptop, it says it is in recovery mode. however, i keep getting error 9 when it's attempting to restore. my phone has been off for 24 hours now and i can't get it to successfully restore
Hey p0507!
Here is an article that addresses your error message, and can help you troubleshoot this issue:
Resolve specific iTunes update and restore errors
http://support.apple.com/kb/ts3694
Configure your security software
Check your security software and settings, which can block ports and prevent connection to Apple servers during update and restore.
Common errors: 2, 4, 6, 9, 1000, 1611, 9006, 9807, 9844. Sometimes as a result of this issue, a device might stop responding during the restore process.
Thanks for using the Apple Support Communities!
Cheers,
Braden -
hello, my iphone 4 has just stopped working it has gone blank..i plugged it into my laptop and it the apple sign keeps flashing it wont connect to itunes either :/ HELP!!!
Try the following:
1. Reset
Hold the Sleep and Home button down until you see the Apple logo
2. Restore:
http://support.apple.com/kb/HT1414
3. Recovery:
http://support.apple.com/kb/HT1808 -
Re: i was charging my iphone 3GS yesterday in electricity when once it turned off suddenly while it was in quarter battery. I tried charging it again but it didint open, i tried to plug it into my laptop but itunes didnt recognize it and it doesnt work.
Hello candymerna,
At this point I would recommeng resetting the device if if will not turn on.
Resetting your device
Press and hold the Sleep/Wake button and the Home button together for at least ten seconds, until the Apple logo appears.
From: iPhone, iPad, iPod touch: Turning off and on (restarting) and resetting
http://support.apple.com/kb/ht1430
If it does turn on, but will not charge then take a look at this part of the article iPhone: Hardware troubleshooting found http://support.apple.com/kb/ts2802
Power/Battery
Battery does not charge from the USB power adapter
Important: Only original iPhone can be charged from a FireWire-based power source. If iPhone is connected to a computer that's turned off or is in sleep or standby mode, the battery may drain.
Verify that the outlet being used is working.
Try another USB power adapter if available.
If no other USB power adapter is available, try connecting to a high-power USB 2.0 port (not a keyboard). The computer must be turned on and not in sleep or standby mode.
Try another USB cable if available.
Also refer to iPhone and iPod touch: Charging the battery.
If it is charging, but not recognized in iTunes take a look at one of these articles depending on your Operating System.
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
or
iOS: Device not recognized in iTunes for Mac OS X
http://support.apple.com/kb/ts1591
Cheers,
Sterling -
i was charging my iphone 3GS yesterday in electricity when once it turned off suddenly while it was in quarter battery. I tried charging it again but it didint open, i tried to plug it into my laptop but itunes didnt recognize it and it doesnt work. help plzzz
Hello candymerna,
At this point I would recommeng resetting the device if if will not turn on.
Resetting your device
Press and hold the Sleep/Wake button and the Home button together for at least ten seconds, until the Apple logo appears.
From: iPhone, iPad, iPod touch: Turning off and on (restarting) and resetting
http://support.apple.com/kb/ht1430
If it does turn on, but will not charge then take a look at this part of the article iPhone: Hardware troubleshooting found http://support.apple.com/kb/ts2802
Power/Battery
Battery does not charge from the USB power adapter
Important: Only original iPhone can be charged from a FireWire-based power source. If iPhone is connected to a computer that's turned off or is in sleep or standby mode, the battery may drain.
Verify that the outlet being used is working.
Try another USB power adapter if available.
If no other USB power adapter is available, try connecting to a high-power USB 2.0 port (not a keyboard). The computer must be turned on and not in sleep or standby mode.
Try another USB cable if available.
Also refer to iPhone and iPod touch: Charging the battery.
If it is charging, but not recognized in iTunes take a look at one of these articles depending on your Operating System.
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
or
iOS: Device not recognized in iTunes for Mac OS X
http://support.apple.com/kb/ts1591
Cheers,
Sterling -
I'm travelling and trying to back up my new iPhone to iCloud. I have sufficient storage, am connected to wifi and it's plugged into a power source and yet it doesn't seem to work at all. I'm currently in India. Could that be the cause or can anyone suggest any reason why this wouldn't work?
"gets stuck" - are there any error messages?
If you get the error "Backup not successful" and you've tried deleting the last backup and trying to back up manually without luck, try the following test: Go to...
Settings>iCloud>Storage & Backup>manage Storage, tap your device name in the Backups section, then look under Backup options. Turn off all apps from backup and then do a manual backup. If that doesn't work, then this post will not help. If the backup works, then go back to the app list and turn some on and try another backup. If successful, keep repeating these steps. If it fails at some point, then try to zero in on the one app that seems to make the backup fail. (I had this problem and found one app failing, probably due to a corrupt data file.)
This process will take time, but if a backup works with no app data being used but clearly fails with the original settings, then somewhere in the mix of apps is a "bad" one. -
i have an iphone lost the music somehow? then went onto itunes on the app it downloaded the music again, but doesnt play and i have to plug it into my laptop and its not my iphone and i cannot sync any of the music any help? the orginial compter now does not work any suggestions?
See Recover your iTunes library from your iPod or iOS device.
In brief; backup the device, recover what you can from it, download other purchases from the iTunes Store, restore the device, add content, keep a backup of your library in future.
tt2 -
My iphone doesnt show up in my itunes. It shows up when i plug it into another laptop. Similarly, when i use someone else's iphone, that shows up in my itunes. Obviously my itunes wont recognise my iphone. Please help
Hello ashbyy123,
Thank you for using Apple Support Communities.
For more information, take a look at:
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/ts1538
2. Check the USB cable
3. Verify that Apple Mobile Device Support is installed
4. Restart the Apple Mobile Device Service
5. Verify that the Apple Mobile Device USB Driver is installed
6. Check for third-party software conflicts
Have a nice day,
Mario -
Since updating my iPhone 3GS on my friends laptop, it keeps asking for her iTunes Id not mine. When I log onto a computer it comes up with my Id but from my phone it's my friends. I don't have an option to change the user Id when it pops up either. So I can't update my apps, download songs or games now as it will charge my friend
Hello, 34sandy.
Thank you for the question. This behavior is normal if updated on another Apple ID account holders computer. To change the Apple ID on your device, follow the steps in the article below.
iOS: Changing the signed-in iTunes Store Apple ID account
http://support.apple.com/kb/ht1311
Cheers,
Jason H. -
my iphone 3gs is in dfu mode, but when i plug it into my laptop to restore it, my phone won't show up in itunes at all. what do i do???? please help, it would be very much appreciated
Follow the steps here VERY CAREFULLY: http://support.apple.com/kb/HT1808
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i downloaded songs to my phone at xmas and when i plugged in to my laptop it wiped the phone of new purchases when i try and download them to my computer in itunes via previous purchesses it wont load the list and i keep getting error 10053 can any1 help
Syncing shouldn't trouch you photos unless you have photos in a Photo Library album. These would be photos that were synced to your phone from your computer. If you do have any, you'll need to use an app like PhotoSync to transfer them to your computer prior to syncing.
If you prefer to backup your camera roll photos prior to syncing, open iTunes and go to Preferences>Devices and check "Prevent...from syncing automatically". Then connect your phone to your computer and import them as explained here: http://support.apple.com/kb/HT4083.
Then, to minimize data loss, follow the steps in this user tip: https://discussions.apple.com/docs/DOC-3141. To follow the steps, first open iTunes and go to View>Show Sidebar. Also, Transfer Purchases is now located in File>Devices. -
Everytime i plug my iphone 4s into my windows laptop, usually it comes up with a small box saying 'installing device' but now it comes up with a box saying 'usb device not recoginised'. i have 4 usb ports in my laptop and i have tried plugging my iphone into each one, but it comes up with the same message. After a while it will charge my phone and connect to my laptop but it wont connect to itunes.
Are there any solutions to my problem which doesnt include me deleting itunes because i dont want to loose my music.
Thanksi have icloud but does that backup everything thats on my phone currently? even music that i have purchased on my phone thats is on my itunes? pic, contacts, apps?
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IPhone is plugged in to my laptop and is charging but will not sync. The phone logo doesn't appear in the right hand corner. i have updated itunes restarted both phone and laptop, changed connectors and still nothing. help?
Same thing happened to me, nothing is working. I've updated everything, restarted everything, nothing seems to work.
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