Gives approximately 500 hours of run time before the batteries need replacement. Once depleted, the eight “C” size batteries within the case can be replaced. It is also possible to power the burner system on 110v and the 12v battery pack at the same time. Then the 12v battery will act as a back-up and your fire pit can be used during a power outage (but not in the house of course).
 
It's only available as an add-on feature for electronic ignition burner systems for SOL, MOD, DECO and ROOT fire tables.