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Q 1: After flashing Android Revolution HD my battery drains much faster. What can I do?

A: Please charge your battery to 100%, boot your device in ClockworkMod Recovery and go to Advanced ---> Wipe Battery Stats. Also see Question 7.

Also please read this ---> [GUIDE] Enlarge your battery life : an attempt to fix the battery drain

And this ---> [How to] Brilliant Battery Life 100% working!

For more details about wiping battery stats please read this