How to get best battery life?

[Yriel40k]

Hi,
I tried different Costum Roms and stock roms, but with none of them I can get a good battery life. The best I could get were 7h and 20% battery drain while stand by with cyanogenmod 7. I could not beat this even with stock rom. But there has to be some rom with better battery life. Can someone suggest me a good rom with good battery life? Performance doesnt really matter for me, every rom is fast enough I think.

 

[czaplin]

CM7 is the best for me with battery life. Try Juice Defender. It turns data off while screen is locked. Helps a lot for me.

 

[Yriel40k]

With Cm7 by xboarder56 I have 49% Android system usage and 31% Mobil-network standby and just 6% Standby with 2 min runtime, so it seems that something keeps the phone running. But i cant figure out what it is...