iPhone 4S battery dies with 19% left. Why?

The EXACT same thing has just happened to me tonight, although I have not restored the phone ever, or added any new apps in the last week.

The battery less than 20% warning came up, I took a picture, then the phone shut down. Would not turn back on and the icon appeared saying it needed to be charged. Plugged it in to charge, and when it came back on I had 19% battery.

Hi,

Has anyone managed to find a fix for this?

My 4s has started shutting down with 20% battery left.

I have ios 6.0.1 installed.

Thanks

Same problem here.. My 4s dies with various levels of battery left. It shuts off, cant turn it on unless I plug it in to the net, and then once it is plugged in it shows a percentage of 10 - 20%. Tonight I turned it on after another shut down and it said it had 23% left, which seems plausible as I didnt use it so long for today; cancelling the possibility that it was actually on 0% but indicated a higher level. Ill do a reset in a minit, see if it works.

If you manage to resolve the problem please could you tell me how. Never had a problem with my 4S then suddenly on Monday it started shutting off just after it reached 20% , it showed the warning then I continued to use the phone and it powered off and has done so several times since. Have made an appointment for Thursday as the device is still under warranty but wondering if it could be something easily resolved?

Thanks

my iphone 5 has had similar issues trying a restore to new fingers crossed

Try this first

1. Try draining the battery all the way till it doesn't turn on again (Keep trying to turn it on when the charge icon comes on the screen)

2. Then charge it all the way to 100% (Do not use your phone as it is charging)

3. Then drain all the way back down to 0% again and do the same as step 1.

4. Charge all the way back upto 100% (Do not use it as it's charging again) and report back here if that help's the problems

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Thank you, I'm in the middle of trying to drain the battery now, just a couple of questions... What do I do if it shuts off just after 20% again? Do I continue the process as if it had shut off at 0%? When you say 'drain it completely' will the battery indicator eventually disappear from the screen when I I keep trying to turn the phone on? Do I need that icon to fully disappear before charging? Also I have read some advice to do a hard reset of the phone when I originally plug the phone back in... Will a hard reset erase the data from my phone? Sorry for all the questions, I just want to ensure that I do this correctly as I don't really want to waste anyone's time taking the phone back if its something I can rectify myself.

Thank you.

I am going to try the suggestion that has been made, did you ever try this? Just with you still having the issues from time to time...

Thanks

Please let me know if it works!

Thanks

I had this issue, I backed up my phone to my mac. Then did a restore, when it asked me if I wanted to restore from backup I selected the backup I had just done. Battery drained all the way down to 0 last night. This morning it has charged as normal.

Thank you, just tried to calibrate the battery and reset the phone so going to see how it goes over the next few days.

Thanks

I'm also having this issue repeatedly. I contacted Apple Support a couple months ago and did all of their recommendations and nothing seemed to work (so they told me to go to the store and get a new phone). I'm now on my 3rd phone in 3 months...all 3 phones have had the exact same problem. My phone just now shut down at 41% and keeps getting worse each day. Recalabrating, restoring, and setting up as a new phone has not resolved my issue with any of these phones. Please let me know if you find something that works!