BB Storm :: Reboots At Random?

My Storm will reboot, seemingly without cause or warning, and sometimes take hours to reach the home screen again. When it does this it will go black, the red light will come on and it usually goes off after a short time. After that a black screen with a clock pops up and finally the BlackBerry screen with the loading bar at the bottom. It goes through this process several times before it will turn on. When it does come on it tells me the battery is drained, even if it was fully charged before it shut off. It makes it pointless to keep paying for a phone.