Power Outage- In the event of a power outage, the batteries will continue to operate your stairlift for approximately 20 roundtrips. In this situation, you can usually save battery power by turning off an isolator switch when you arenโt using the stairlift.ย Call now for a free no-obligation in-home evaluation with a guaranteed price in writingย 888 542-3834ย (Click To Call).