How can we help you? How is the stair lift powered? 1 out of 2 found this helpful Our stair lifts are powered by 24V DC batteries which are always charging at the top or bottom landing. Was this helpful? Yes (1) No (0) Category: General Related Questions Can I take the arms off of the stair lift to make the seat wider? Will my insurance cover the cost of a stair lift? How long do the batteries last? What happens in the case of a power outage?