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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.