Replacement Battery for Automatic Gate Openers (FM150)

The Mighty Mule FM150 12V gate opener battery delivers reliable power for your automatic gate opener while fitting neatly into all standard Mighty Mule control boxes. Designed as a maintenance-free gate battery, it provides 2–3 years of long-lasting service life so you can enjoy uninterrupted access. Replacement battery for Mighty Mule HD272, MM571W, and MM572W opener kits ensures seamless compatibility. Fits all standard Mighty Mule control boxes with no modifications required. Maintenance-free gate battery design eliminates routine checks and fluid top-ups. 7 Amp/hour capacity delivers consistent power for smooth gate movement. Long-lasting gate opener battery life of 2–3 years under typical usage and environmental conditions. Backed by a 12‑month Mighty Mule warranty and dedicated technical support. Compatible with MMB200 battery enclosure accessory for new MM271, MM272, MM371W, and MM372W kits.