My husband experienced this problem twice already with his 4s! Last time he had the software previous to 6.1.1, and this time he has the latest software- 6.1.3 and still the problem exists!
Yesterday he plugged it into the socket using our usual charger and left it for 1.5 hours. When i checked it to unplug it, it showed 90%! I left it for another 20 minutes and still it showed 90% and the sign - fully charged (you know this icon in the corner). Since I am against leaving the phone charging overnight I unplugged it.
In the morning my husband found the phone charged on 1%!!!! so it wet down from 90% to 1% overnight!
And that's taking into account the fact that my husband hardly had any applications installed and his email is never checked automatically (which eats the power!!!). so nothing can really discharge it even on 5% overnight!
In the morning I decided to switch it off and turn it on again. I did switch it off and never went on!
My husband took it to work, plugged it into computer and socket (tried different ways)....it was plugged into the socket for 6 hours!!! and in 6 hours it turned on only to show 1%!!!!
He brought it back home where I was to bring it back to factory settings (the thing that helped him 2 month ago when we first experienced this problem with this iPhone).
I plugged it into the laptop and tried to reset it using itunes. Everything went well (the phone showed 1% all the time), until the program needed to reboot the phone to finish the process of reseting. The phone was turned off and it never turned on again!!!! So the reset failed!
Now it's dead again and been like that for couple of hours already and I cannot even bring it back to factory settings (which really helped us before. But before the charging time was a bit less and even though it went dead as well, when it came back to reality it showed 3-4% straight away and that was enough to reset it (bring it back to factory settings).
So what should I do now?
I bought it in the states and I live it Russia and starting last fall Apple store stopped exchanging their products worldwide!!!! I can only exchange it by bringing it back to the States!!!!
Apple! I have already contacted your support a few months ago with this problem and noone helped me. Will this be resolved?! What am I supposed to do now?!