Rated 4.75 out of 5 based on 53 customer ratings
(53 customer reviews)

$28.99

12V 9AH Battery Replacement for Generac XG8000E Portable Generators

Availability: In stock

SKU: ML9-12NB16 Category:
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
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

53 reviews for 12V 9AH Battery Replacement for Generac XG8000E Portable Generators

  1. Rated 4 out of 5

    Jose Barcenas (verified owner)

    Probably too early to leave a review but sofar soo good.
    Fair price.
    Good service.
    Fast delivery.
    Can’t complain.
    I’ll recommend. 👍

  2. Rated 5 out of 5

    Louis M. (verified owner)

    Affordable, quick delivery, easy transaction.

  3. Rated 5 out of 5

    M. Cunningham

    Came on time and was an exact fit replacement.

  4. Rated 5 out of 5

    Haley Sears

    General generator

  5. Rated 5 out of 5

    Asa smith

    Installed on a battery jump pack/portable compressor.

  6. Rated 4 out of 5

    bluzboy

    correct size. good value for cost. don’t know how long it will last. difficult to install but that’s the generator issue not battery.

  7. Rated 5 out of 5

    lansing farney

    Great product!!! Thank-You!!!

  8. Rated 1 out of 5

    r s roosa

    I noted in the picture that the wire connection tabs where rotated from the original but thought that would be ok. However they are also wider and the connectors on the gerarator don’t fit on battery.

  9. Rated 5 out of 5

    Michael F. Tolipano

    It was for my generator

  10. Rated 5 out of 5

    arnie lee

    good product

  11. Rated 5 out of 5

    Steve Wojo

    Installed this in a generator with an unknown aged battery in it. Works great. I keep a battery tender on this one.

  12. Rated 5 out of 5

    dave caprio

    So far so good

  13. Rated 3 out of 5

    John S.

    While the battery was a perfect fit and started the generator right up, the connectors are entirely different from those on the original equipment battery. Now I imagine if you are a homeowner replacing this battery you are competent with hand tools and understand electricity to a degree. If not, have someone replace this battery for you. Not only because of the the amount of disassembly you have to do to access the battery but because the terminal on this battery DO NOT direct fit the generator side of the wiring. Don’t put in the title of the product this item is for a certain generator if it doesn’t fit exactly.

  14. Rated 5 out of 5

    Kara

    Awesome battery, came fast and was easy to install. Even came with a set of screws for the terminals!

  15. Rated 5 out of 5

    Billie Faye King

    So far so good but waiting to see what the Longevity is on this battery. I have found the last two batteries I have bought have only lasted 2 years each. They were NOT this brand!

  16. Rated 5 out of 5

    Dheges

    Repaired vehicle start pack. Worked well

  17. Rated 5 out of 5

    The Headhunter

    No problems — fits like the original on my Generac generator and works great!

  18. Rated 5 out of 5

    Grady J. Mathias

    This is my second battery and I am sure it will last as long as the first.

  19. Rated 5 out of 5

    Bart Beall

    Great replacement for my generator

  20. Rated 5 out of 5

    Dennis McKay

    fit good

  21. Rated 5 out of 5

    moo

    Generator battery

  22. Rated 4 out of 5

    Anne M Dickinson

    Bought for a friends generator to replace old battery

  23. Rated 5 out of 5

    Sitou A.

    Upgrade for my old generac GP7500

  24. Rated 5 out of 5

    jcj

    i needed this battery for my generators and these are tough batteries and i like shopping online, i do not have to go anywhere to get what i want, the price is good also.

  25. Rated 4 out of 5

    Cheapgary

    Warranty is 1 year on all. So why pay mor5e.

  26. Rated 5 out of 5

    robert muller

    i purchased this to replace the battery in a jump start pack . it came very rapidly and worked perfectly .

  27. Rated 5 out of 5

    Web Customer

    Generator. As advertised

  28. Rated 5 out of 5

    Kelsey

  29. Rated 5 out of 5

    Robin Webster

    It did what we needed. Was satisfied.

  30. Rated 5 out of 5

    RAAM Graphics

    Great little battery

  31. Rated 5 out of 5

    Laurie

    Fits as it should. Great product

  32. Rated 5 out of 5

    Linda Helfenstine

    Started right up.

  33. Rated 5 out of 5

    A. Sellers

    Replacement battery for my Generac portable generator.

  34. Rated 5 out of 5

    AL

    My Generac GX8000E is up & running! Good strong battery and a perfect replacement. I’m happy.

  35. Rated 5 out of 5

    Jeffrey Judd

    This also works in the Generac XT8000EFI Generators

  36. Rated 5 out of 5

    Cheryl Bischoff

    It was exactly what my husband was looking for

  37. Rated 5 out of 5

    Eric Malchow

    Fit perfectly.

  38. Rated 5 out of 5

    Eric Malchow

    Fit perfectly.

  39. Rated 5 out of 5

    David LaBorde

    Exact Fit. Fast Delivery. Hope for long service life.

  40. Rated 5 out of 5

    terry

    Was a replacement and it works fine

  41. Rated 5 out of 5

    R. Purvis

    Battery appears to be just as stated.

  42. Rated 5 out of 5

    Web Customer

    Replacement battery for generator.

  43. Rated 5 out of 5

    Customer

    Replacement battery for generator.

  44. Rated 5 out of 5

    joe richards

    worked great. was as described . would order from this company again. thanks

  45. Rated 5 out of 5

    Margaret Adams

    Just what I wanted!

  46. Rated 5 out of 5

    Ramon Gonzalez Jr.

    took old battery out put in new battery. pushed start button and it started. did not have to charge.

  47. Rated 5 out of 5

    nighthawk53

    Great battery

  48. Rated 5 out of 5

    REK

    As adv’d

  49. Rated 5 out of 5

    Ramon Gonzalez Jr.

    took old battery out put in new battery. pushed start button and it started. did not have to charge.

  50. Rated 4 out of 5

    Fred Dawson Customer

    Bought a replacement for Rally 8 in 1 better battery than the original . Came charged and rapidly. Will use on my next camping trip.

  51. Rated 5 out of 5

    GingerMan

    Perfect drop in replacement battery for the generator. Came charged and started right up.

  52. Rated 5 out of 5

    Master Card

    I use this for my Generac generator. I moved my battery from inside of my generator to the outside. It was go hard to get to the battery and it works great!!!!!!!!! It is a good quality battery.

  53. Rated 3 out of 5

    stephen dzialo

    The battery was a good fit except for the terminal ends, I had to slightly retrofit the connections, which some people might have trouble with. I am an auto mechanic so I was able to make it work

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Excellent
Mighty Max Battery
Based on 3456 reviews
Very good batteries, i've had good experience with this brand. Bring back 2 ups just today ! Way cheaper than new ups.
Easy to install
Perfect fit. High quality item. Highly recommend.
I had purchased a Mighty Max Gel battery almost 1 year to the day of it failing, I contacted Mighty Max, and in a very simple process they warrantied the faulty battery and sent out a new battery. I definitely would buy another Mighty Max battery just because of their customer service.
Replacement for the battery in this. Over the years I've done exactly this a number of times.
Wonderful.
Couldn’t be happier with arrived battery.
Thank you.
So far, the Mighty Max YTX16-BS battery has worked as expected. It arrived from Amazon and delivery was quick. I needed a battery for my 4 wheeler fast and at a better price than Oreilys, Walmart, etc.
Easy to install
Works great as always ...mounted to a generator set up for easy start works just as it should