Mighty Max Battery

Mighty Max Battery 12V 9AH Battery Replacement for Generac XG8000E Portable Generators

4.6(1,188)

566+ bought in the past month

$25.00

About this item

  • ML9-12NB SLA is a 12V 9AH Sealed Lead Acid (SLA) rechargeable maintenance free battery - UL Certified
  • Dimensions: 5.94 inches x 2.56 inches x 3.94 inches. Terminal: Nut and Bolt. Listing is for the Battery only. No wire harness or mounting accessories included.
  • SLA / AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures and long service life.
  • Rechargeable battery that can be mounted in any position, resists shocks and vibration. Long lasting high performance in high and low temperatures.
  • Full One Year Warranty
$25.00

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Product details

BrandMighty Max Battery
Vehicle Service TypeATV
Size1 Pack
Voltage12 Volts
Battery Cell CompositionLead Acid
Item Weight5 Pounds
Product Dimensions5.94"D x 2.56"W x 3.94"H
TerminalNut & Bolt
Battery Capacity9 Amp Hours
Automotive Fit TypeUniversal Fit

Technical specifications

brandMighty Max Battery
size1 Pack
product_dimensions5.94"D x 2.56"W x 3.94"H
terminalNut & Bolt
battery_capacity9 Amp Hours
automotive_fit_typeUniversal Fit
manufacturerMighty Max Battery
upc759478369828
modelML9-12NB16
item_weight5 pounds
item_model_numberML9-12NB16
batteries1 12V batteries required. (included)
manufacturer_part_numberML9-12NB16
amperage9 Amps
best_sellers_rank#28,288 in Health & Household ( See Top 100 in Health & Household ) #36 in 12V Batteries
date_first_availableJanuary 1, 2010

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Customer reviews

4.61,188 ratings

Customers say

Customers find the battery works well with their generators, particularly noting its compatibility with the Generac GP8000e model.

★★★★★

Perfect Fit for Generac GP8000e Generator

AL NOLF—December 15, 2025

Received the battery on-time, well packaged, and n good condition. This battery is the perfect replacement to fit the Generac GP8000e portable generator that is the emergency power unit for my home. I was delighted t discover that it arrived with a Full charge & was ready to go to work! The weather has been harsh in the North Country this year - and it isn't even winter yet! This battery replaces one just like it which lasted eight years and never let e down ...until it did. I can't complain about it's functionality, power, or longevity, it's been a real workhorse, and saved our bacon dozens of times. Read more

★★★★★

Good to go battery

Decent, smells great. But very oily—December 24, 2025

Battery replacement worked, for a fraction of the cost from local battery spot. Easy to install, works as intended, great value. I’ve ordered and installed multiple of these Read more

★★★★★

Best Generac Replacement Battery

Baja Alan—December 24, 2025

Looked all over for a replacement battery for my Generac Generator and this works and fits great. Great value for the money and easy to install. Read more

★★★★☆

Delivered on time and as expected Just what I needed

Herman E Davie—January 22, 2025

This battery is to replace my battery for my Generac battery start generator, which I let go dead. I also ordered a charger so that will not happen again. The battery is a form, fit, function replacement and just what I needed Read more

★★★★★

Worked like a champ Exact Fit

Constantine—December 23, 2025

Worked as it should. Charged it with NoCo Genius , and installed. Size was correct, easy to install. Posts were correct and fired up the generator. seemed a good value , plenty of power, only if it lasts as long as the original. original lasted over 6 years and was on a maintainer the whole time. Read more

★★★★★

Works great, quality products at a competitive price.

FlatlineYourBird Series Decoys LLC—December 15, 2025

Works great, quality products at a competitive price. Read more

★★★★★

⭐️

Yarisbel Marrero Rodríguez—December 12, 2025

Superb and lasts a very long time, excellent product Read more

★★★★★

Good battery

gary l. balestrieri jr.—December 31, 2025

This battery fit in my iPower generator. Model number SUA4000ier. It was convenient that the terminal posts were on one side because of the short length of the cables. I trickle charged it overnight and it has strong starting power. So far so good! Read more

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