25/5 Updates : Also see this ! http://blog.g4team.com/?p=5288
I saw many people even me have a noticeable battery decrease. I have a suggestion for this .
1) Try to Setup a new device without restore any data. ( I know it’s crazy for some users…) But some report told that it will have a lot !
2) MUST use the latest Redsn0w (at least using 0.9.6rc16). for those who did jailbreak already using old version of Redsn0w, you MUST redo it again, just untick install cydia, tick other option like enable gesture to redo the jailbreak process, the new fix will be installed and you WON’T loss any data even cydia.
Hope this help for all.