ML18-12 GEL - 12 Volt 18 AH, GEL Type, Internal Thread (INT) Terminal, Rechargeable SLA AGM Battery
ML18-12 GEL - 12 Volt 18 AH, GEL Type, Internal Thread (INT) Terminal, Rechargeable SLA AGM Battery
ML18-12 GEL - 12 Volt 18 AH, GEL Type, Internal Thread (INT) Terminal, Rechargeable SLA AGM Battery
ML18-12 GEL - 12 Volt 18 AH, GEL Type, Internal Thread (INT) Terminal, Rechargeable SLA AGM Battery
ML18-12 GEL - 12 Volt 18 AH, GEL Type, Internal Thread (INT) Terminal, Rechargeable SLA AGM Battery
Rated 4.73 out of 5 based on 15 customer ratings
(15 customer reviews)

$44.99

12V 18AH GEL Replacement Battery for FM12180

SKU: ML18-12GEL103 Category:
Thumbnail Short Description Price Add to Cart Button
$ 44.99
$ 85.99
$ 169.99
Delivering power when you need it, the Mighty Max ML18-12GEL 12 Volt 18 AH (Maintenance Free) battery. Requires no addition of water during the life of the battery. The Mighty Max ML18-12 GEL is a TRUE DEEP CYCLE battery that can be mounted in any position, requires no maintenance. When a Gel Cell battery is charged, no hazardous fumes escape the battery case, gases are processed within the battery itself.
Mighty Max GEL batteries are utilized in a wide variety of applications including; Consumer Electronics, Electric Vehicles, Engine Starters, Golf Carts, Hunting, Lawn and Garden Tools, Medical Mobility, Motorcycles, Power sports, Portable Tools, Solar, Toys and Hobby, Access Control Devices, Emergency Lighting, Security and  more
Specifications: 
Voltage: 12 Volt
Amperage: 18 AH
Chemistry: GEL
Terminal: Internal Thread
Battery Dimensions:
7.00 in x 2.87 in x 6.50 in
Weight: 11.90 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack, 4 Pack
Volts

12V
Amp Hour

18Ah
Chemistry

Gel
Terminal

Internal Thread
Quantity

1
Length

7.00
Width

2.87
Height

6.50
Weight

11.90 Lbs
Warranty

1 Year

15 reviews for 12V 18AH GEL Replacement Battery for FM12180

  1. Rated 5 out of 5

    Dyon –

    Good choice for a back-up battery for HAM radio go Box

  2. Rated 4 out of 5

    A.C. –

    works great right now, only time will tell

  3. Rated 5 out of 5

    Rogbaby1 –

    I like that it is a Gel battery at a great price

  4. Rated 5 out of 5

    Craig Hissong –

    Just installed this battery on my new, slightly USED, low hours Generator. It fired the generator up quickly. I will edit this review in about 9 months and will report on how this battery holds up in the Florida heat. So far, so good.

  5. Rated 5 out of 5

    Very intriguing –

    I have always had good luck with Mighty Max batteries. Some have lasted 6 years so that’s a great return on the dollar spent. Depending on the battery and application, the cost can be as little as $3 per year. Not bad at all. They are excellent batteries.

  6. Rated 5 out of 5

    rparker559 –

    perfect replacement Battery

  7. Rated 3 out of 5

    danny mccraw –

  8. Rated 5 out of 5

    Akinola Ojeleye –

    This battery was bought for my generator. It is doing a great job.

  9. Rated 5 out of 5

    P Rife –

    Exact fit and so far great performance, installed in Black Max 7kw generator. Thanks

  10. Rated 4 out of 5

    Doug –

    I figured it would be cheaper to replace the battery in my 15 year old Xantrex powerpack 400 plus than buy a new unit. Decided to upgrade to the gel battery over the standard since it did not cost that much more and is a deep cycle battery. I was very disappointed to see the terminals were inboard on the battery I received not outboard like the stock photo everybody has. It was immensely difficult to connect the cables in the booster box since the cables were a fixed length. I had to dismantle the booster box and carefully bend everything so I could connect the battery and get the cover back on.

  11. Rated 5 out of 5

    Web Customer –

  12. Rated 5 out of 5

    Customer –

    Muy buena bateria. Me funciono ñerfectamente para mi generador

  13. Rated 5 out of 5

    Mike –

    Better power, hopeing it will hold a charge longer .

  14. Rated 5 out of 5

    Barry Goodson –

    Timely shipment and works according to design.

  15. Rated 5 out of 5

    Chris Robles –

    Works fantastic.

Only logged in customers who have purchased this product may leave a review.

Excellent
Mighty Max Battery
Based on 3474 reviews
See all reviews
John & Cathy
Arrived quickly. Even got a sticker with it.
Sean Chacon
Solid looking battery, came well packaged. Have used their battery before for my lawnmower and now looking forward to see how it lasts in my snowmobile.
larry scervino
I can't believe it less than 48hrs since I ordered from Walmart and it's in the machine. What more can I say except great price.
Thanks Larry
Paul Major
Item as described and perfect fit and arrived on time
Manny Jaramillo
Battery arrived in a good shape package strait to my door steps
Robin Lauer
Arrived just in time to power my generator here in the cold Maine winters. Excellent service!
Shutter Dog Homestead
Arrived quickly from WALMART.COM. Perfect size and proper placement in my generator. Installation was easy. Generator fired right up. Battery came fully charged.
Larry Geiger
New battery. Ready for cold weather!
Harmon Chandler
So far these Might Max batteries are good but it’s only the first day and they were on charge for 12 hrs. I’ll have to come back and do an update at some point in time. Ordered them on Amazon and got them the next day. I was encouraged by Mighty Max to make this google review and post pictures to extend my warranty for 3 months but there is no way to post pictures 🤣🤣🤣 It’s been a few months and I was able to go back and edit, so here is a video I made, the rest of the photos I have deleted. Batteries are still going strong. Update 12-11-2025
Carl Ruckinger
They arrived within 2 days of ordering them packaging was really good I haven't put them in my MX350 yet I hit them with my multi meter fresh out of the box and got 12.4v on both batteries so that is good

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