Hi, I just obtained the same external batteries everyone has for MR-1 and want to know proper way to hook up... Seems best to take USB out if battery into a DC5V plug and into the Korg MR-1... Is this correct? Please let me hear from you great people... The first time I hooked it up this way I got a fatal error and now I can't get rid of it. Can't even turn the deck off. Please help !!! Peace, Joe Ray