Wasn't sure what topic to put this under, but I've had this Backtrack + mic for about 2 or 3 years now. The battery won't charge anymore when I plug it into my USB port on my MAC. It used to charge fine a few months ago, I haven't used it in a while. The battery is dead, but it won't charge. Upon plugging it into the USB port, I turn the switch on to the middle notch. It turns on with the white light, then it flickers red and orange--indicating that it's dead. Then it turns off. It won't charge even though its properly plugged in! HELP?! Does it need a new battery???