Q: iPhone 6 iOS10 Battery Percentage Incorrect

Bart Taylor wrote:

 

On my iPhone 6 running latest iOS 10 (10.0.1) my battery percentage indicator is incorrect most of the time. I cannot tell if the percentage indicator is stuck or something else is going on. This happened w/iOS 9, but seems to have been worsened with iOS 10. Below are two typical scenarios:

 

1. Indicator states value > 50%, but then shuts down

2. Indicator states value ~ 10%, but then when plugged into charging cable indicator jumps to 30%.

 

I see that when people were complaining about this prior the answer was to 'upgrade to iOS 9.3+' - well, that obviously is not working for me. I'd like to have an indicator that actually represents the amount of battery life I have left.

http://www.apple.com/batteries/maximizing-performance/

Bart Taylor wrote:

 

That doesn't help. The issue isn't maximizing performance, but of the battery percentage indicator displaying inconsistent and incorrect values.

There used to be a tip in that articles, which is now updated, that to real calibrate the battery, you let it fully die to where the phone shuts off and then you power it up to 100% without using it.

I have exactly the same problem, I believe there is a bug in iOS since 9.1.

Another weird symptom of the problem is:

1. Make sure that your phone's displayed battery percentage is below 80%

2. Turn on "Low Power Mode"

3. Charge your iPhone

4. Once the battery is charged to 80%, iOS would pop out a message: LOW POWER MODE TURNED OFF. Battery sufficiently charged.

This problem is repeatable and it must be a bug with the iOS release.

The weird symptom is intended behaviour, since the battery is over 80% the low power mode is not needed anymore.

Hi! I had this problem some weeks ago. In this discussion you can read what I performed and how I solved it.

iPhone 6 battery percentage unreliable

In my case, it was a software problem, solved restoring my iPhone as new.