Amazon Customer 2 The problem is one of the batteries I previously bought to use in my MD player actually doesnt charge in this. I guess the battery is broken somehow. But both of my MD players are old so I cant charge them that way either. I dont really know what to do. Do I spend more money on new batteries so I can test them out on this charger, or just listen to my players while plugged into power. I dont know. How can I give this any stars if I dont know if this is not working or the battery is not working.