Sony Ericsson x8 Short Battery Life

This Sony Ericsson x8 phone was pretty old, like 2.5 years old. Maybe the battery is getting old or this Ginger DX custom rom uses too much battery, it only lasts 1.5 days even with airplane mode on and all other features like wifi, GPS are all off.

Compare to my other phone, LG Optimus T that can last 9 days with airplane mode.
http://www.youtube.com/watch?v=1suq4WuISmc

Видео Sony Ericsson x8 Short Battery Life канала Stanley Yu