A battery-powered backup sump pump will operate in the event of a power failure or if your primary sump pump stops working for any reason. If your basement is finished or you store anything you care about in your basement, you should have a backup sump pump in place. The cost of having a backup sump pump is negligible compared to the cost of flood cleanup and water restoration services. Most insurance companies will discount a homeowner’s insurance policy if there is a backup sump pump system installed.