I wiped the batterystats file this morning after charging my phone to 100% and unplugged it like I know I'm supposed to, but in the afternoon my phone froze up and I had to pull the battery because the screen wouldn't turn on or anything. it was about 70% before it froze, and when I turned it back on and read the battery usage graph there was a steep drop to 63%. Is pulling the battery or turning off the phone while calibrating an unadvisable thing to do, like should I re do calibration?