I'm using samsung j7 nxt for 7 months.It is showing today now battery uasge not available.I attached a screenshot.plzz help me.

my j7 nxt battery drains too fast and Charging is too slow.plzz fix it with update.

I have a battery calibration issue with my 4 months old samsung galaxy j7 nxt.Today I noticed that after disconnecting charger at 80%.at that time my phone was in switch off mode.When I powered on I have seen that the battery level is showing 85%.Aga...

please release January 2018 update patch for samsung galaxy j7 nxt.and some more features like youtube video in popup window on screen.and lots more.

I restored my phone on yesterday morning..And In the Battery Uasge of Device Maintenance section showing Learning Usage Pattern.why my estimated battery life is not shown??