Something is killing my iPod Touch's battery?

After being plugged in and fully charged, the battery will run down to like 70% after 30 minutes...without having wifi turned on...only listen to music with it in sleep mode... I'm on 5.0 jailbroken with redsn0w...the iPod is a iPod touch 4g 32 gig... I've removed mobile substrate already.. Installed... show more After being plugged in and fully charged, the battery will run down to like 70% after 30 minutes...without having wifi turned on...only listen to music with it in sleep mode...

I'm on 5.0 jailbroken with redsn0w...the iPod is a iPod touch 4g 32 gig... I've removed mobile substrate already..

Installed packages from Cydia (simple):
Appsync 5.0
Bigboss Icon Set
Cydia Installer
Cydia Translations
Hackulous Recources
iFile (it is the XSellize cracked one)
Installous 4
Idone
Source GUI

Available Upgrades:
Appsync for 5.0+
Core Utilities (/bin)

Anything else you need to know to help?
5 answers 5