My battery still has a normal drain
What nothings do you mean?
When i'm on wifi, my battery drains 1% every 3 minutes. I did a factory reset and a clean rom install of cm 10.2 stable and is till get this problem.. Really annoying since I dont use data at all and just wifi. How can i fix this?
20% battery drain per hour - when you use it continuously, e.g. gaming, streaming video or navigating - is pretty average in my experience. The screen is by far the biggest juice consumer.
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It's 3 minutes 1% when idle. When i stream videos, its about 6% for 11 minutes.
If by 'idle' you mean it's 'on', in standby mode, with screen off, and no special processes running in the background, then yes your 'drain rate' is indeed waaay too much and suggests that there is a process running in the background!
Have you got statistics that show what apps/processes are using up your battery? You could use the free app 'Battery Stats Plus' for that. It might throw some more light on your problem's cause.