All,
You might try this to reset your Battery Usage calculation statistics. It worked for me and it does NOT ROOT you phone.
To save time do this before you go to bed.
Turn your phone off by holding the on/off button until the phone turns completely off
Remove the battery, the SD card, and the SIM card.
Wait a couple of minutes and reinstall the SiM card, SD card and the battery BUT DO NOT turn the phone back on...Do NOT.
Before you go to bed keep the phone turned off and plug it into the small 110 volt 1 Amp charger that came with the phone and let it charge overnight.
The next morning DO NOT turn the phone on just unplug the charger and immediately re-plug it back in to further charge the battery. Every time it says 100% unplug and replug it in. Do this 3 or 4 or more times. If you walked away and missed the 100% just unplug it and do it again.
NOTE: Because the phone is OFF when you plug it in you will first see a gray battery for a few seconds and then a green battery for a minute or two on the display before the screen goes blank (black).. The battery looks like a standard flashlight battery. The green battery will say 100% if it is fully charged. When you see 100% unplug the charger and re plug it in. The battery charges a little more each time and usually in 3-8 minutes it again says 100%. Doing this tops off the battery a little bit more each time. Remember do it 3 or 4 times.
Finally, turn ON your phone and go to Settings>About phone> Battery Use and look at your phones Battery Usage Calculations. They should be reset. At the top of this screen the amount of time "on the battery" should be a matter of minutes because you just reset the statistics.
The attached screen shot shows my battery usage statistics AFTER I reset them. If you want to see my battery usage BEFORE I reset them go to this URL and read my original post in that thread. It showsa screen shot of my battery usage.
http://community.vzw.com/t5/DROID-Charge-by-Samsung/Battery-use-by-the-APP-GPS-Status-amp-Toolbox-What-s-Up-with/td-p/751866
JerryF
PS, You might take a screen shot of you current Battery Statistics before you do this for comparison.