Samsung Galaxy S4 I9500 - Battery Draining!

[Ichigo91]

Hi,

Anyone knows why when my device is completely turned off, the battery keeps draining empty completely overnight?

Also when I reached below %15, device turns off.

 

[Suardy Ardy]

Hi,

Anyone knows why when my device is completely turned off, the battery keeps draining empty completely overnight?

Also when I reached below %15, device turns off.