hello everyone I have a samsung j5 2016 and recently I had a problem that when the battery is below 50 percent the phone shuts down and needs to be charged. The operating system is Nougat 7.1.1 can you tell me what the problem might be, maybe a bad battery The fault is gone. Cheers
An option is to back up and factory reset @Goran3
If that does not help then a Samsung Experience Store or Samsung Service Centre can take a look.
You can check the batteries health in a few ways.
There are battery monitor apps as well as the phoneinfo app and CPU-Z App from the Playstore and also in your phone look at your Samsung Members App diagnostic tool.
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.