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iPhone 4S battery

Battery drains in 12 hous just on standby ?

Posted on Oct 15, 2011 2:25 PM

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52 replies

Oct 17, 2011 3:43 AM in response to robinfrommendon

I got my iPhone 4S 32GB (Sprint) on Friday. After activating and syncing with iTunes, and light use throughout the weekend, I still have 49% battery life remaining on Monday with location services on (have not yet charged it; it's still running off the charge it had when I received it). We do have a very strong signal here thanks to a femtocell in our home which supposedly helps extend battery life, but otherwise I have been impressed with the 4S's battery.

Oct 17, 2011 8:18 AM in response to robinfrommendon

Got mine Friday and it is losing charge quickly too. It seems to be better today. When I got my first iphone I was told to drain it completely (at least to <5%) then charge it completely without using it during charges. Do this for the first 3 charges and it will extend the battery life considerably.


I've done this will all my iphones and it works. I'm on my second charge on the 4S and it's life is improving. Fully charged last night and it's only at 93% now. So that's only 7% loss with just 29 minutes usage and 5 hours on standby. That's a vast improvement since Friday.

I have one more complete draining to go and that should do it.


Try that, it sure has worked for me..

Oct 17, 2011 9:42 AM in response to robinfrommendon

Now while I did this on the 3GS I noticed increased battery drain running IOS 5. One solution I found was to completly remover ALL mailboxes by physically deleting them in settings. Reboot phone and re-install each mail server (I have 3) so wasnt that hard and I only push my exchange server all others I manually check but even in 24 hrs I noticed a big difference after doing that.

iPhone 4S battery

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