Default [Q] Poor Battery life

Hi, My HTC One drop from 100% to 93% in 7 minutes of gameplay of Clash of clans, why the battery life is so poor?

And i noticed there's auto awake during my phone sleep.
Have change from ARHD to ViperOne and there's still auto awake?
Thank me if i helped

All my devices : HTC One V (ROM : Ignorance V4)(Almost retired) -> HTC One (InsertCoin 1.00 Sense6 )