Originally Posted by arhung
It seems the android system get a high percentage of the battery usage, so that my phone drain battery very fast, why this happen and how to fix it?
your going to have to download betterybatterystats or gsam battery monitor. just that screenshot wont give us any useful info to go by to deduce why your android system is so high. though it is quite common from what i'm seeing and what i've been testing on multiple roms and multiple kernel setups.
HTC One: ViperONE. elementalX kernel.
Nexus7 8gb: CMX.1 nightlies / franco kernel
Retired: HTC Evo 4g LTE / HTC MyTouch4G / Apple Iphone 3g 16gb / Blackberry Tour 9600 / HTC Mogul(6800) / HTC Touch Pro / HTC Touch Pro2