Need suggestions to discharge powered down iPhone 4s battery

yssteve

macrumors newbie
Original poster
Apr 7, 2014
2
0
hey guys,

in summary, i think my 4s is having some battery calibration problem. started with batt % dropping rapidly to 1%, but managed to on itself after i charged it for abit.

stayed at 1% for the entire day. so i'm pretty sure it's still holding charge, just not displaying the real charge. made the mistake of charging it to full, and trying to restore it.

i believe my phone thinks it's on low on juice while holding a full charge, so what i have to do is to let the battery run down to say 80% and charge it so it'll boot up again. the problem is i have no idea how to drain the battery while it's off..

any one with any suggestion? will repeated restoring attempts do that? (the attempts ends with my phone showing me the low batt screen while it tries to restart after the restore..)

thanks folks!
 

Gav2k

macrumors G3
Jul 24, 2009
9,218
1,585
When it powers off and you hit the power button to show the low battery symbol. Rather than plugging it in do a hard reset by holding the power and home button and it should boot up. Keep doing this throughout the day or as soon as it boots play a graphically intensive game to rapidly drain the battery
 

yssteve

macrumors newbie
Original poster
Apr 7, 2014
2
0
Thanks Gav2k!

Tried hard resetting it but now it refuses to boot, shows the plug in screen
 

T5BRICK

macrumors G3
Aug 3, 2006
8,089
2,057
Oregon
Lithium ion batteries don't really have a memory like old NiCad and NiMH batteries used to.

It sounds like your battery is dead and needs to be replaced. Could be a damaged cell or an issue with the internal charging circuitry on the battery.
 

BrettApple

macrumors 65816
Apr 3, 2010
1,098
375
Heart of the midwest
My 4S, and my brothers, and my nieces, were all doing exactly that. I replaced the battery in each one and instantly fixed the problem. They were old batteries and had gone through many charge cycles and had just worn out and weren't working properly anymore.

It would stay at 1% for hours, or spontaneously power off at 15-20%.

I got the battery from iphone4parts for $9 shipped. Works great. If you don't have one, they have a cheap screwdriver toolkit you can get with it so you can remove the Pentalobe screws and cable attaching the battery.