Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I see a lot of threads about poor battery life.

While it's true that lithium ion batteries don't need traditional training, they do lose sync with their internal meter which tells it how much charge to accept, how much is remaining, etc. This happens as you use your phone normally and should be repeated about once a month to keep your battery in tip-top shape.

To fully realize the potential of your battery, do this:

1. Use phone until it turns off.
2. Plug into wall charger.
3. Phone will power on after a few minutes.
4. Turn it back OFF.
5. Wait three hours to ensure the last of the trickle charge gets in there.
6. Power your phone back on. If the meter does not read 100%, power back down and continue charging.

That's it! Powering while off prevents parasitic load, which is basically the device and the battery vying for power. This can confuse the battery's internal "meter" so to speak.

Also, this is not meant to be a magic bullet for battery life. if you use your phone a lot, get lots of notifications, or are in a poor signal area, your battery will drain faster. Hopefully you can eek out a few extra minutes by using this method :cool:

Please post your findings if this helps!

mine has been amazing... Probably go 2 days on 1 charge with my normal usage.
4S gave me about a day and a half tops.
 
i charge my battery at 40 percent, 20 percent, 34 percent, etc. all the time. i've owned every iphone and have never had an issue with losing battery capacity over the months even after 11 or 12 months. then again, i've never gone more than 13 or 14 months with one iphone because i always get the new one so this is a non issue for me. i say this is all a matter of preference and your own beliefs.
 
Let the battery run down and the phone power itself off

LEAVE it UNplugged for 6-8hrs. Then plug it in to 500mA USB, let it turn on, then you manually turn it off.


The slow charge from genuine zombie state will maximize the meter sync.


I did this, on advice of the laptop subforum here (for the laptop battery), every now and then and it does indeed improve run time.
 
I only plug my phone when it complete shuts off and my battery its been great!
19-25 hrs standby and 5-7hr of use.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.