iPhone 4 keeps losing power at 20%

[jake.palmer99]

Over the last few days, every time my iPhone 4 gets down to around 20%, usually just above, it suddenly closes the application I'm on, flashes that it's at 1% battery and turns off. I then put it on charge and starts at 20% again. It's happened 3 times in the last two days, I've tried a soft reset and I've charged it up to 100% every time. It's the first real problem I've had with my phone after 6 months of having it. Any suggestions would be helpful?

 

[Skull One]

Only suggestion I can think of is to do a full backup thru iTunes and then a full restore. Make sure you do this when the phone is at 100% charge. Hopefully that will reset the battery stats collection and allow the phone to properly recalibrate.

 

[EWyatt]

Just curious, Jake... does the battery indicator hover around the 20% range for a long time (relatively) or does the rate of discharge seem fairly linear?

 

[jake.palmer99]

Fairly linear, but it stays on 100 for quite a long time, I rang up apple today though and I've got an appointment on Monday to get a free replacement phone, the guy i spoke to said that it wasn't something that he had encountered before

 

[EWyatt]

Yeah, really. The batt indicator should NOT hover at 100% for a long time. Perhaps it's just a bad battery that Apple can replace..... Let us know.

 

[kingnba6]

Welcome to the forum

 

[stuberger]

I've been having the same problem with my iPhone 4....it will get to about 23 or so percent and then it shuts down...when I try to start it up it shows 1% then when I plug in the cord it show the same 20 some odd %..... This has just recently started to do this. Bad thing is I don't live near any Apple Store and would have to at least drive a 2 1/2 hr trek but would rather do that then get a replacement from Verizon since I'd get a refurbed one.

One thing I was wondering, I have Battery Doctor app which I hardly use but have used it...I wonder if this could be a culprit. Or probably just the battery????