Why does my battery indicator not give honest measurement?

[AC Question]

I have a Samsung Galaxy Note 4 running 5.1.1 and have been experiencing incorrect battery life measurement. My battery meter will say I have anywhere from 15-35% battery life left, then the phone will shut off and restart, when it comes back on the battery meter will now register 0-1%. Any reasons why I'm experiencing this issue? And are there any known fixes?

 

[B. Diddy]

Welcome to Android Central! The battery might be defective or failing. Does it drain quickly, or charge up slowly and heat up a lot?

The battery software might also be a bit off. You can try calibrating it by charging up fully, then using it until it shuts off. Do this about 3 times, and see if it becomes more accurate after that.