Hello, I have a big problem, when I update to 7.1.12 mi battery start to drain very very fast, like 1.5h of screen in the best duration, so change the ROM to 7.1.5 with a clean flash, but the problem it's still there, I try battery calibration apps, full charge on and off, and full discharge, but nothing, now I change again to Eu stable, but the problem is there again, please can someone help me? I'm freaking out
