iPhone 6s - Battery Indicator Stuck On 100%

[Buadhai]

Starting yesterday my iPhone 6s (13.3) battery indicator gets stuck on 100%. It stays there until the phone shows the discharged battery iconon the screen. When I plug it in to a charger, it instantly goes up to 99 or 100%. There are many solutions online to this. I have tried:

• Turning battery percentage on and off
• Turning set the date automatically on and off
• Turned 24 hour time on and off
• Force restarted the phone

Coconut Battery shows that the phone is fully charged even when that is impossible.

I suppose the next step is to wipe and restore the phone, but I don't hold out much hope that this will actually work.

Any other ideas?

 

[amgff84]

Starting yesterday my iPhone 6s (13.3) battery indicator gets stuck on 100%. It stays there until the phone shows the discharged battery iconon the screen. When I plug it in to a charger, it instantly goes up to 99 or 100%. There are many solutions online to this. I have tried:

• Turning battery percentage on and off
• Turning set the date automatically on and off
• Turned 24 hour time on and off
• Force restarted the phone

Coconut Battery shows that the phone is fully charged even when that is impossible.

I suppose the next step is to wipe and restore the phone, but I don't hold out much hope that this will actually work.

Any other ideas?

Those phones are pretty easy to tear apart and replace the battery, and given it's age, it's probably a bad battery.

Here's what I think you should do;

If you want a less invasive procedure, reset phone. It's possible it's a software issue.
If you're worried about losing data, tear the phone apart and replace the battery.

iFixit has a teardown tutorial. It may require you to purchase tools you don't have. You can find equivalent tools online, or eBay sometimes has kits with the necessary tools in it with the battery.

The reason I don't think it's software, is because there hasn't been any updates in the past day or so that I could imagine to impact battery. If the phone was dropped or hit, it's possible it could be a loose connection, if the phone was already taken apart and the screws holding the battery connection in place were not put back.

You probably just have a failed battery.

iFixit 6S teardown.
eBay listing for battery with tools.

Personally, I would buy a for parts 6S and the tools, so I can have an apple battery. Which is how I ended up with piles of crap in my basement that I lose. The 6S was and still is a great phone.

Hope this helps and good luck bud.

 

[Elitegate]

Probably just an old and faulty battery. How long does the battery last? Have it replaced.

 

[Buadhai]

I’m on my third battery for this phone. The original battery failed in just over a year and was replaced under the Apple Battery Replacement Program. That second battery failed after less than a year. I gave up on Apple and bought a third party battery. It’s about a year old.

After my OP the situation got worse. The phone kept rebooting on its own. As soon as I entered my passcode it would reboot. I decided to force reboot. After that the battery showed 79% which seemed better than either 100% or 10%.

Since it suddenly seemed stable I started playing music with it via a Bluetooth speaker. I’m listening to music when I glance at my Apple Watch which has that clock-like progress indicator. I check the phone which tells me that the watch is syncing and almost ready for use.

Bummer because I’m baking bread and had set a timer on the watch so I now have no idea when the bread will be done.

After half an hour the watch is synced. I check the iPhone which has a screen saying "Welcome to Apple Watch" and something about my new watch being ready for use.

So, at this point the iPhone and the Apple Watch seem to be operating normally.

It would be interesting to know exactly what happened, but I suppose that’s wishful thinking.

 

[Buadhai]

The battery history.
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View attachment 886996
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The battery history.
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View attachment 886996

 

[JPack]

Without a proper diagnostic at a repair shop, the problem is difficult to determine. It could be a failed Tigris chip or it be something else on the logic board. But it's clear there's a hardware problem.

 

[Buadhai]

I left it off the charger all night last night and this morning it still shows 100%. So, yeah, hardware problem. Maybe it's time for a new phone.

 

[Buadhai]

After seeing me struggle with the phone for a few days my wife came home with a brand new iPhone for me. Bless her heart. That gave me some leeway to play with the 6s. I let the battery run completely down thinking it might be a calibration issue. I did an "Erase All Content and Settings".

Finally I did a factory reset and reinstalled iOS. That seems to have worked. The battery indicator is no longer stuck on 100% and decreases with usage as expected. Coconut Battery now displays reasonable figures for capacity and current charge.

Only time will tell whether or not this fix lasts.

But, it does seem that it was neither a hardware nor battery issue.

Don't tell my wife, she might take the new phone back.

 

[Buadhai]

I'm sure everyone is bored to death with this thread. However, after I did a factory reset of the phone I decided to see how long the battery would last. I did a minimal setup. No SIM. No Apple ID. No App or iTunes Store accounts. I charged it to 100%, removed it from the charger and started playing YouTube videos continuously via Safari. After three plus hours of playing, screen on all the time, the battery was only down to 84%, at which point I decided to quit.