Yes, you have to re-calibrate your battery stats.
No, the CWM menu option to wipe battery stats is not right, for some reason.
Go get this free app: Battery Calibration
Charge your battery all the way up and let it sit charging for a few minutes after you see the light turn green (while turned on and booted up)
After it's been green for a few minutes, open this app and click the big "calibrate" button, and then un-plug it from the charger.
Let it run down until it turns itself off, without plugging it in. This means no usb to the computer, either - and don't turn it off manually.
After it turns itself off from lack of juice, plug it in (wait about 30 seconds) and then turn it back on. If you turn it on too quickly weird things may happen, depends on how depleted the battery is. (usually there is 1 or 2 % left so it's ok)
Leave it plugged in and turned on until fully charged. After that, you can feel free to play with it, but you should run it up and down a few more times without charging in-between. The first one is critical to do this way, though, or you are just wasting your time.
You MUST be rooted, or it will not work. (said for others who may need this info)
Tip to drain battery - screen brightness all the way up, screen to not turn off, and turn the flashlight app on. Leave it sit for a few hours.
Tip to charge quickly while on: Turn all wireless and data communication off, tap power button to turn screen off (keeping phone on)
Good luck, it'll solve the problem though.
Nook Color: MicroSD info: Here
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