If you want to make sure your sump pump is always working properly, a backup battery would be a good idea. But Basement Watchdog actually makes a combination sump pump power system that controls you primary (AC) power and has a backup battery (DC) for emergencies. This video shows you how to install the complete combo sump pump system to make sure the flooding never starts. Find out how to assess the sump pit, install the combo system, connect the sump pump to the standby battery and more. Keep your basement water-free.