Mighty Mule AGO Battery and Enclosure - External Battery Kit

In this review of the Mighty Mule AGO Battery and Enclosure kit, the bottom line is straightforward: this is a practical, weather-rated battery storage solution for owners of compatible Mighty Mule gate openers who need a neat, secure place to house a backup or solar-fed battery. The reviewer found it especially useful for setups where the control box location offers limited internal battery space, and the included 12v 7aH sealed lead acid battery (FM150) makes initial setup simple. Installation is aimed at homeowners and small ranch operators who want a durable enclosure and a ready-to-use battery without sourcing parts separately.

Key Features

• Complete kit: Includes an enclosure, one 12v 7aH sealed lead acid battery and the necessary battery harnesses and mounting hardware to get started quickly.
• Outdoor rated enclosure: Designed for outdoor mounting and can be attached to chain link, panel, vinyl, ornamental or wood fence types for flexible placement.
• Solar system ready: The enclosure accepts two FM150 batteries when extra capacity is required, which is recommended for solar powered gate openers to improve runtime.
• Compatibility: Works with select Mighty Mule gate openers including MM271, MM272, MM371, MM371W and MM571W-EST so you can add external battery storage where needed.
• Mounting flexibility: Intended to mount adjacent to or behind the listed control boxes to keep wiring tidy and the battery accessible for maintenance.
• Warranty and support: Backed by a 12-month warranty with technical support for peace of mind during installation and early use.

Who It's For

This enclosure kit suits homeowners, small farm or ranch owners and installers who run a compatible Mighty Mule opener and need an external battery location, especially when the control box cannot fit a battery or when a solar panel is part of the system. It is also useful for anyone who wants a packaged solution that includes harnesses and mounting hardware so there is less hunting for compatible parts.

Those who should look elsewhere include users who need higher capacity batteries out of the box or a fully integrated solar charging solution; the kit ships with a single 12v 7aH battery and solar-reliant systems are recommended to use two batteries for best performance.

Pros & Cons

Pros

• Well packaged kit that includes the FM150 battery, harnesses and mounting hardware for faster installation.
• Solid fit and finish for outdoor mounting, with positive reports on quality and compatibility with listed gate openers.
• Scalable capacity since the enclosure can hold two FM150 batteries for extended runtime or solar setups.

Cons

• Battery life reports are mixed, with some customers finding the included 7aH battery wore out sooner than expected under heavy use.
• Only one battery is included, so users planning a solar system or long runtimes will likely need to purchase a second FM150 separately.

Specifications

Kit contents	Enclosure, (1) 12v 7aH FM150 battery, (2) battery harnesses, mounting hardware
Battery type	12v 7aH Sealed Lead Acid rechargeable maintenance free (FM150)
Expandable capacity	Enclosure holds up to two FM150 batteries
Compatible openers	MM271, MM272, MM371, MM371W, MM571W-EST
Mounting	Mount adjacent to or behind control box; fits chain link, panel, vinyl, ornamental and wood fences
Warranty	12-month Mighty Mule warranty and technical support

Our Verdict

The Mighty Mule AGO Battery and Enclosure kit is a practical, no-nonsense accessory for owners of compatible Mighty Mule openers who need external battery storage. It offers easy installation, good build quality and the option to add a second FM150 battery for solar or extended runtime, making it a sensible value for those who want a ready-made solution rather than sourcing parts separately.

Frequently Asked Questions

Can the enclosure hold more than one battery?
Yes, the MMB200 enclosure can hold two 12v 7aH FM150 batteries for added capacity or solar setups.

Which gate openers is this kit compatible with?
It is compatible with MM271, MM272, MM371, MM371W and MM571W-EST gate openers as listed by the manufacturer.

Is the included battery maintenance free?
Yes, the FM150 is a sealed lead acid rechargeable maintenance free battery intended for outdoor use inside the enclosure.