Yes, every stair lift that we install is powered through the use of two 12 volt batteries. When the stair lift is installed, we plug the battery charger into a standard wall socket, meaning no additional wiring is necessary in the majority of homes. When the stair lift is parked, it charges the batteries so it will be ready for the next use. Some units can make up to 60 trips on a single charge. The Handicare 1100 stair lift has a continuous charge strip, allowing the lift to charge at any point on the rail.