Thanks for the suggestion and everything else up the line here the other bike is a 36v downtube. I'm waiting for a reply from Nethers Battery who I found on ebay with an add to rebuild Prodeco 36v with Samsung 35E for $425 w/return shipping.That's a wow. I looked at his feedback and he's done some 48v for the same price so I hope he'll do mine.. If not my backup is Ebike Marketplace who is more $$$ but my exact battery is on their webpage. I'm waiting on the cell brand from them but at least the Marketplace do these for sure and that's a relief for now because this bike is a bear to pedal without a battery.