Iphone 5s Battery Drains In Some Hours (Battery zero)

Iphone 5s Battery Drains In Some Hours (Battery zero) Then Charging And Charging is ok.after charging battrey gets full 100%.

1:-pmic changed ok,not solved
2:-u2 ic changed ok ,not solved
3:-battery changed ok from other working phone,not solved.
4:-baseband pmic changed ok,not solved

need help to find it out . thanks