[Galaxy Grand Prime] Why is my battery draining so fast after root?

[bogdanmunteanuo_O]

So i have rooted my Samsung Galaxy Grand Prime SM-G351F by basically installing a custom,already rooted,rom (cm-11-20160115-SNAPSHOT-XNH0E0O00N-i9300).First 2-3 weeks or so were great,but after that my battery started draining really fast.I don't keep my 3G on,i don't have SYNC on,I use Greenify,close all the apps and I try to keep the luminosity to minimum. But even so,i let it LITERALLY sit to do nothing,screen locked and in 2-3 hours,my battery is already down 25-30%. Can anyone help me?

 

[B. Diddy]

Moved to the Grand forum.