Lately, I've noticed my N800 w/ OS2008 hanging. I've noticed today, that it seemed to be when it is connected to the internet. I've thought about doing a backup, and then reflashing the OS. Any other suggestions?

I've noticed after it hangs/reboots that the battery has gone down considerably. Is this from it getting the CPU locked up?

Also, I've dropped it recently, hard enough for the front cover to pop off. But besides some scratches, nothing seemed broken except that it seems slower.