4.4 vs 6.0 (aka Miui 7 vs Miui 8)
I switched to miui7 (Android 6.0) and then to miui 8(android 6.0) for a few months now.
A lot of changes and improvements in these new versions but still... the battery life is horrible.
With a usage that with android 4.4 would last 3 days, with android 6. it...