Mogul Battery Probelm

[ooregulateoo]

Hi i recently had my mogul for about 2 months and its great. i also installed the lazyboy iphone theme and everything runs fine.... my battery was great it would go all day without losing more then 50 percent with the theme and i did the battery tweek.... but my phone became really laggy because i installed the wrong cab for the mogul so i did a hard reset and ever since then my batter life has been going down hill....i cant even last one day without my battery dying.....

anyone know what could be wrong? should i look at buying a new battery