Ok, I haven't used my MDLP in quite awhile. I tried to charge it on it's docking station this morning. Instead of saying "charging" on its screen, it just started making clicking sounds every 2-3 seconds. It sounded like it was trying to do something, but never did. I left it on for a long time. The unit will play, record, etc. if it's on the charging dock, but won't do anything if taken off. Do MD rechargeable batteries go dead that easily without being able to recharge? Is there some trick I could use to get it to charge? I really need help because it's not mine. I borrowed it from a friend