GTO RB422 Battery, 12 Volt, 1.2 Amp Hr.
Replacement Battery for Mighty Mule FM250 Automatic Gate Opener and the Bulldog Pedestrian Gate Lock (GTO FM145). 12 Volt 1.2 amp-hour. Life expectancy is 1-2 years. This battery is maintenance-free, and is the only battery approved for use with the Mighty Mule FM250 gate opener system. The RB422 replacement battery is available for other models of GTO Gate Operators.