Sixth iteration of Apple iPhone, announced on September 12, 2012. Repair of this device is similar to the previous models, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Black or White.

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Battery not indicating drain or charge

I'm running into an issue that just started this week. I was having lots of battery issues a few months ago, so I replaced the battery with the one purchased from here at iFixit around 4-5 months ago. All has been great since then until this week.

I noticed that the battery percentage seems to be "stuck" on a certain value until I reboot the phone. I plugged it in last night with 23% left, and this morning it still said 23% despite the charge symbol showing. I rebooted the phone and it suddenly showed the correct 100%. Looking in Usage it still showed the standby and usage numbers from yesterday, but when I plugged the phone in again, it all reset to 0, indicating that it had a full charge.

Within an hour, I was browsing FB and Instagram, and the phone shut off and rebooted itself twice. When this happened, the screen suddenly had a weird look on it for a split second, before turning off, and then the Apple logo coming up. Did that twice in a matter of minutes.

So now it's mid-morning, and I have used the phone some, but it still shows 100% battery which I know is not right. Looking in Usage, now for Usage and Standby since last full charge, it just shows dash marks, where this morning it said "0 minutes" after had rebooted and plugged in the phone again.

And just now I rebooted the phone again, and it's now showing 86%, which seems correct based on the usage I've put on the phone this morning. Usage time since last full charge still shows as dashes.

Again I'm using the battery that comes in the kit available here on iFixit, and I haven't had any problems at all until just this week. I do have the problem with my sleep/wake button that Apple has documented and I can get fixed, just haven't gotten around to taking it to the Apple store yet.

Answer this question I have this problem too

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2 Answers

Back it up first, then what I would do is drain the battery 100% and leave it drained for 5 hours (if you can). To complete a battery drain cycle. Then recharge the iPhone's battery up to 100% without interruption. If that doesn't work back it up to iTunes and restore the software.

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Thanks I'll give it a try. Any good way to drain the battery quickly besides just letting it sit?

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What's the significance of the 5 hours leaving it completely discharged?

So today after showing 80% all afternoon and evening, I rebooted the phone just before bed. After it came back up it showed 48%. I used it for just a few more minutes, and then the screen did the weird thing again where it appeared to get dim suddenly, then phone just rebooted itself. When it came back up the battery showed 60%! What the heck??

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The purpose is to completely drain the battery to pure 0%. Typically when your iPhone shuts off by its self there is still 1-2% left so by waiting 5 hours before charging it will get it down to 0%. Try this to drain your battery: turn on the flash light, turn the brightness up to full, and open Real Racing 3 and start a match. This should drain your battery. Don't restart your phone on purpose just walk away and let it drain. The after five hours of it being dead recharge it completely to 100% and see what happens. If that doesn't work I would replace the battery. The iPhone 5 does have battery issues and this might be the way your iPhone is being effected by it.

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Sounds like hardware to me. I would get a new battery and of course since I see it a lot, I would worry about U2. Have you recently used a car charger? If it is U2, then it won't be able to charge a dead battery so I'd have a new battery in hand before allowing this battery to drain to 0%

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Read your update---that is a bad battery or a break in the gas gauge line on the board.

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So today the battery percentage seemed to jump around a couple of times, but then sat on 24% most of the day. Tonight I was using the phone and it just shut off. Did not come back on. I plugged it in and the Apple logo just kept going on and off. The phone started back up once, but then shut off immediately when I unplugged it. When I plugged it back in it never would start back up again. Just Apple logo on and off repeatedly.

So I took the old battery I took out of my wife's phone (I put ifixit batteries in both of ours at the same time) and put it into my phone, and now the phone is on and charging.

So it seems the ifixit battery has gone bad?

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