LiftSeat Spare Battery can be purchased as a back up battery for your LiftSeat unit.
With the battery plugged into the back of the LiftSeat control box, you will always have power even when the lights go out. The control box on the LiftSeat has a built in charger that will keep the battery fully charged as long as the unit is plugged into an AC outlet.
A fully charged battery is rated for 50 up/down cycles, so you can get more than a weeks worth of lifts if the power goes out.
we recommend purchasing the battery back up if you live in an area prone to power outages.