GTO RB500 Battery, 12 Volt, 7.0 Amp Hr. - 8 PACK
The GTO RB500 or Mighty Mule FM150 is the replacement battery for the following Mighty Mule gate openers as well as most GTO/PRO Operators. Each battery is 12 Volt, 7 amp-hour. This maintenance-free battery is the only battery approved for use with the gate operators listed. Life expectancy is 3-5 years.