I too own an SQ80. Having experienced the same problems, I replaced the internal battery and all was well. Cost of battery was about $12. The literature you want should be available thru an Ensoniq dealer although it will have to be ordered as probably will the battery. The SQ80 still, to me, makes a nice controller and,coupled with other modules, makes a nice simple 8 track seq. Hope this helps a little......Chip