Liftmaster 475LM Evercharge Battery Back-Up System Works with LiftMaster® models 2500, 3500, 3800 and 8500C garage door openers  Operates the garage door opener as if the power was still on (all...
Liftmaster 475LM Evercharge Battery Back-Up System Works with LiftMaster® models 2500, 3500, 3800 and 8500C garage door openers  Operates the garage door opener as if the power was still on (all...
$139.95