Rated 4.90 out of 5 based on 10 customer ratings
(10 customer reviews)

$17.99

12V 5Ah UPS Battery Replaces 4Ah MX-12040, MX12040

SKU: ML5-123231 Category:
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$17.99
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Delivering power when you need it, the Mighty Max ML5-12 12 Volt 5 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 ML5-12 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: 5 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions: 
3.58 in x 2.76 in x 4.21 in
Weight: 3.09 Lbs
Warranty 1 Year
Multi Packs Bundled Savings

12 Pack, 1 Pack, 2 Pack, 3 Pack, 4 Pack, 6 Pack, 9 Pack

Volts

12V

Amp Hour

5Ah

Chemistry

SLA / AGM

Quantity

1

Length

3.58

Width

2.76

Height

4.21

Weight

3.09 Lbs

Warranty

1 Year

10 reviews for 12V 5Ah UPS Battery Replaces 4Ah MX-12040, MX12040

  1. Rated 4 out of 5

    E D

    April 2020. Had battery for a little more than one year and it is already time for replacement. The original Union MX-12040 lasted three years (I bought three of them, three years apart, beginning in 2011). Not happy that this one lasted only one year. Buying again because there appears to be no better substitute.Fast delivery, well packaged. Fit exactly in place of original battery. Worked from the beginning with no problems.

  2. Rated 5 out of 5

    Wayne Fetman

    Just what we needed

  3. Rated 5 out of 5

    Barbara D.

    This battery fits just fine for my ADT system. To early to tell how long it will last. Mailing was very fast, packing was great! Happy so far!

  4. Rated 5 out of 5

    Robert Cholewick

    it works

  5. Rated 5 out of 5

    Robert Cholewick

    it works

  6. Rated 5 out of 5

    S. Vassello

    Ordered it – it came promptly – works great !

  7. Rated 5 out of 5

    Web Customer

    perfect replacement

  8. Rated 5 out of 5

    Customer

    perfect replacement

  9. Rated 5 out of 5

    D. Woodall

    Worked perfectly for my ancient Radio Shack House Alarm.

  10. Rated 5 out of 5

    Stev

    very good battery

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Excellent
Mighty Max Battery
Based on 4564 reviews
Purchased the Mighty Max 12v 10 Amp hr YTX12-BS. Amazon said it would fit my 2012 Kawasaki Ninja 650. It fits in the spot size wise but it's too tall and won't let the seat safely fasten. I have to return the battery unfortunately. It was a really nice battery and priced well.
Simple ordering, delivery, and installation. Performed as advertised.
Bought for my sons 2023 Kayo Fox 70cc quad. Works very well so far. Fit great as well.
Great battery for an even better price. Don’t waste your time going to the big box stores. Just order the Mighty Max from Amazon. Easy install and perfect fit. Fired right up with no issues.
He comprado una batería para el auto de mi niño ya deseo probarla y ver contento a mi bb
He comprado la batería migrhymax modelo ML5-12 de 12v y 5 amp y todo me llegó bien ya no veo la hora de probarlo en el auto de mi niño la amara
Arrived in excellent shape inside an outer layer of cardboard. Pleasant transaction
Battery shipped fast and arrived next day. Well made construction. No complaints yet.
Reasonable price with fast delivery to keep our generator in service for emergencies.
Old batteries and New batteries installed. Very heavy. Charging them up now for tomorrow's mowing. I'll let you know if everything goes well.

Update 6/9/2022
Batteries charged up nicely and have without fail have run up to 2 hours work time and are doing fine.