I need some help with my droid

[steeldragonnyc]

This has happened more than once. I go to use my droid and when i try to wake it up nothing happens. the screen stays off. I know its not the battery since I last left it at 90%. Only thing that makes it work again is if I pop off the battery. Then when I put it back on and press the power button every thing works again.. Anybody know what could be causing that?

P.S I have the Motorola Droid not rooted with latest official update. Thanks in advance.