I've got an older black MB that I'm having trouble with the battery. When I unplug it from the wall with a full charge the MB immediately dies. I think this is something more serious (I hear possibly a logic board issue) and wanted to totally drain the battery and fully recharge it to see if that would help any. Since I can't run it down while the computer is plugged in, I wondered if there was any software that would force it to run down. Or software that would let you refresh the battery like good battery chargers do. Thanks for any help.