Limoss Smps Mc-140 29 Volt 2 Amp With Battery Back-Up Limoss Transformer Model ZB-A290020-B Limoss Power Supply With Battery Back Up Comes with slot for 2 9v Batteries to serve as a battery back up in case of a power outage Compatible with most major lift chair, power recline, and theater seating linear actuator companies 500407, 500241, 500097, 500002, 500009, 500481