ML9-12NB -12 Volt 9 AH, Nut and Bolt (NB) Terminal, Rechargeable SLA AGM Battery
ML9-12NB -12 Volt 9 AH, Nut and Bolt (NB) Terminal, Rechargeable SLA AGM Battery
ML9-12NB -12 Volt 9 AH, Nut and Bolt (NB) Terminal, Rechargeable SLA AGM Battery
ML9-12NB -12 Volt 9 AH, Nut and Bolt (NB) Terminal, Rechargeable SLA AGM Battery
ML9-12NB -12 Volt 9 AH, Nut and Bolt (NB) Terminal, Rechargeable SLA AGM Battery
Rated 4.72 out of 5 based on 25 customer ratings
(25 customer reviews)

$29.99

12V 9AH SLA Battery Replacement for Generac YD9-12

SKU: ML9-12NB19 Category:
Thumbnail Short Description Price Add to Cart Button
$29.99
$54.99
Delivering power when you need it, the Mighty Max ML9-12 12 Volt 9 AH uses a state of the art, heavy-duty, calcium-alloy grid that provides exceptional performance and service life in both float and cyclic applications.
The ML9-12 is an Absorbent Glass Mat (AGM) technology with a valve regulated design, that can be used in enclosed and indoor environments without leaking or maintenance, providing a superior performance for thousands of models.
Mighty Max SLA 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: 9 AH
Chemistry: SLA, AGM
Terminal: Nut and Bolt
Battery Dimensions: 
5.94 in x 2.56 in x 3.94 in
Weight: 5.17 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack
Volts

12V
Amp Hour

9Ah
Chemistry

SLA / AGM
Terminal

Nut and Bolt
Quantity

1
Length

5.94
Width

2.56
Height

3.94
Weight

5.17 Lbs
Warranty

1 Year

25 reviews for 12V 9AH SLA Battery Replacement for Generac YD9-12

  1. Rated 5 out of 5

    Kent –

    I ordered a battery. I received a battery. The battery fit in the generator.

  2. Rated 5 out of 5

    Patticake –

    My husband said this was a good buy.

  3. Rated 5 out of 5

    guido –

    The exact replacement for the battery on my generator. Charged it up and it worked like a charm.

  4. Rated 5 out of 5

    Kip G. Dillow –

    great product

  5. Rated 5 out of 5

    Kip G. Dillow –

    great product

  6. Rated 4 out of 5

    irene stewart –

    it was for my generator

  7. Rated 5 out of 5

    Clay breaker –

    This was a starter battery for my portable generator. Perfect fit. Was delivered ahead of schedule. Was at a good price. Would defiantly reccomend. Will buy again when needed.

  8. Rated 5 out of 5

    Rick Jandura –

    Works as expected

  9. Rated 5 out of 5

    Rick Jandura –

    Works as expected

  10. Rated 4 out of 5

    M. T. –

    So I was pleasantly surprised when Mighty Max sent me another battery on their own volition to fix my terminal problem. The NB terminals for the new battery is oriented exactly as pictured (the original battery that was sent had the terminals oriented parallel to the width of the battery and not parallel to the length of the battery as pictured). I will give it to Mighty Max, very surprised that they listened to comments here on , and made things right. I’m changing my rating to 4 stars, and will update after i install the battery.

  11. Rated 5 out of 5

    Lenwood –

    This battery was an exact fit replacement for the Stanley 700. It came with new bolt& nuts for the terminals and it arrived 90% charged. An easy and inexpensive replacement.

  12. Rated 5 out of 5

    wezzz –

    this was a great option for a replacement battery in my Clore Automotive Jump-N-Carry JNC300XL. it was a bear to reroute the wires and get it closed again, but that is no fault of the battery. saved me from spending $86 on a new jump pack, and saved me quite a bit over the oem replacement battery as well. thus far it has performed as well as the original battery, but im not running intense tests on it or anything. it was installed in feb 2020. if it wears out or fails, ill update this review, but so far so good!

  13. Rated 5 out of 5

    Ron B –

    Bought this for a portable General generator. It fit perfectly and had plenty of power to start the generator.

  14. Rated 5 out of 5

    Jim –

    Like size for my portable generator.

  15. Rated 5 out of 5

    Deborah –

    Perfect fit for my jump starter. Terminals are a little short but it worked fine with the included hardware.

  16. Rated 5 out of 5

    Deborah –

    Perfect fit for my jump starter. Terminals are a little short but it worked fine with the included hardware.

  17. Rated 5 out of 5

    David Alexander –

    Great price and fit.

  18. Rated 3 out of 5

    Rick S –

    The terminal bolt holes need to be altered in order to attach the wire ferrel.

  19. Rated 5 out of 5

    George Covert –

    Battery fit perfectly. Up and running.

  20. Rated 3 out of 5

    Nancy Gorres –

    battery works great but I had to modify the cable terminal ends from the generator because the terminals on the battery were sunk in too short to fit the cable ends,they should spend more time & money on mfg & quality control,maybe less on advertising. on the plus side,i was impressed with inventory&quick delivery.none of the local generac dealers stock a battery!

  21. Rated 5 out of 5

    HunterClan –

    The battery came quickly. When we put it on the generator, it had a pretty good charge on it. I would buy this product again.

  22. Rated 5 out of 5

    HunterClan –

    The battery came quickly. When we put it on the generator, it had a pretty good charge on it.I would buy this product again.

  23. Rated 5 out of 5

    id4 –

    fully charged when received.

  24. Rated 4 out of 5

    Sergei Pepper –

    Is doing great he did better than the original battery that came with my booster pack the booster original battery lasted a month that was it

  25. Rated 5 out of 5

    Adran T. Hanson –

    Looked locally and all I found were batteries set up for slid on clips. I needed bolt on. This was perfect. Generator fired right up.

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Mighty Max Battery
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Joe Boutte
Delivered on time and expected!
Brian Kuehl
Great Battery for the Ion Block Rocker Bluetooth speaker to make it mobile
David Stoner
This is the second pair of batteries that I am using in my Champion 8500 home generator. Manufacturer says replace batteries every two years in Floridas hot summer seasons. Had the first pair of these batteries installed over three tears and still start the 24v generator every time. Installed new ones because hurricane season 2026 started, and I don’t want to install the new ones during a hurricane. Best batteries I have ever had. First set from another company barely made it two years. Go Mighty Max!
Jerry Kuemper
Arrived on time. And was exactly what it was described. Exact match
Rudy Laurel
I am really pleased with the performance of the MIGHTY MAX BATTERIES I purchase to replace the ones that came on my RYOBI Zero Turn Mower.
Alfredo Gomez
From Amazon.ca arrived on time
Steve Okon
It arrived quickly and was ready to use.
skinnyd1982
I had to replace the battery in my back up generator. Purchased the Mighty Max on Sunday. Delivered on Monday. Installation in the generator was a breeze due to the perfect size and correct terminals. I’m confident this battery will last for years to come and will make powering my home easy when power goes out.
Joe DesRosier
Great price, arrived as promptly and made in the USA.
Pastor Anthony Davis
The battery arrived in a timely manner.

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