Galaxy s7 Phone shuts off at 15%

[Marco Martin]

Not sure what's going on, but my phone just shuts off once it hits 15%. It never did it before until the latest update I did just a few days ago. Once it shuts off it shows a plug symbol and when I plug it in, it shows its 0% battery. Any way to fix this?

 

[Rukbat]

It's probably set to now - to cause the battery life to get short. You should never discharge the battery down below 40% (so you wouldn't know that it would shut off if it reaches 15%.) Lithium batteries are not deep discharge devices. Even discharging it to 15% every charge cycle could reduce the life to less than a year, and it sounds as if you're expecting it to discharge to 0%, which would kill it in a few months. (See Battery University - How to Prolong Lithium-based Batteries if you don't believe me.)