Thanks Meter 866
Join Date: Jul 2011
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My battery is a little poor too, but it was because I was with my cellphone screen on almost the whole day... When it was an extreme case (when I was in 4.3 AOSP ROM and it didn't last even some hours, like you), I recalibrated it (I used to do it with my Xoom and X10 Mini Pro, it may be a placebo, but looks like it worked...
To recalibrate simply let your battery run completely out, then plug to the charger and let it charger completely while turned off (the white battery icon appears), then turn it on and let it run out again, then charge fully again. Remember that plugging and unplugging your device from the charger is bad for your battery, and remember to keep the screen brightness very low, turn off WiFi, Bluetooth and SPECIALLY 3G when you're not using.
Hope this helps,