Help battery draining very badly

See I have android 5.0.2 from sky dragon and my battery life very bad I can not complete 2 hour and half complete on a full charge plz help me out. The only reason why I'm using android 5 is because of the Harmon/kardon sound mod in it.plz help me out thx

from xda-developers http://ift.tt/1VIqk09
via IFTTT