Rated 4.81 out of 5 based on 21 customer ratings
(21 customer reviews)

$17.99

ML5-12 – 12V 5AH Replacement Battery for ADT 804302 12V 4.5Ah Alarm

SKU: ML5-122541111 Category:
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$ 17.99
$ 28.99
$ 39.99
$ 52.99
$ 74.99
$ 109.99
$ 139.99
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

21 reviews for ML5-12 – 12V 5AH Replacement Battery for ADT 804302 12V 4.5Ah Alarm

  1. Rated 3 out of 5

    Nick

    Not sure how long are these batteries suppose to last, but mine is dead in 4 years. Used for my home security system.

  2. Rated 5 out of 5

    Caesar Acosta

    Great product , it works as expected, I used on a Battery back up Chamberlain garage opener with no issues. Great price compare to the regular hardware store.

  3. Rated 5 out of 5

    Dennis Bentley

    Worked as advertised. Thank you.

  4. Rated 4 out of 5

    Barbara L

    Replaced a defunct battery backup in my home security system. Don’t know what the longevity of this battery will be, but previously I was getting about 5 to 6 years of battery life. Priced reasonably and fit right in existing enclosure.

  5. Rated 5 out of 5

    Web Customer

    perfect replacement for my spotlight

  6. Rated 5 out of 5

    Customer

    perfect replacement for my spotlight

  7. Rated 5 out of 5

    Kasey

    Working great for my Honeywell Vista 20P from Protection One. Existing connectors on the panel popped right on. It is lower capacity than what I had originally from the security company but I’m not too concerned and it’s no fault of this battery.

  8. Rated 5 out of 5

    Kasey

    Working great for my Honeywell Vista 20P from Protection One. Existing connectors on the panel popped right on. It is lower capacity than what I had originally from the security company but I’m not too concerned and it’s no fault of this battery.

  9. Rated 5 out of 5

    dmitch

    It worked extremely well as a replacement for my original battery. Product arrived on time

  10. Rated 5 out of 5

    Cee Cee

    great for the price, and very easy to install

  11. Rated 5 out of 5

    THOMAS NUMANN

    fast service and good pricing.

  12. Rated 5 out of 5

    Jonathan Inz, Ph.D.

    easy delivery. Right battery.

  13. Rated 5 out of 5

    David

    As advertised

  14. Rated 5 out of 5

    David

    As advertised

  15. Rated 4 out of 5

    Uncle P

    I replaced an ADT Battery with this one. No fanfare, no trouble, works perfectly and fits the space. 100% satisfied.

  16. Rated 5 out of 5

    Michael Wells

    Works as advertised…

  17. Rated 5 out of 5

    G. P. Edwards

    Great little battery for the money.

  18. Rated 5 out of 5

    Buzz

    Great replacement Battery.

  19. Rated 5 out of 5

    Ioan Saftoiu

    Received in due time, only time will tell if the quality is as expected

  20. Rated 5 out of 5

    Ioan Saftoiu

    Received in due time, only time will tell if the quality is as expected

  21. Rated 5 out of 5

    Peter Baldeo

    Its pretty simple. …your battery died on the alarm system…The security company wanted $$$$$$ to come and basically replace a battery. …Great buy…saved serious $$$$$…no brainer plugging it in…works fine ….will definitely buy again …

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

Excellent
Mighty Max Battery
Based on 3474 reviews
Arrived quickly. Even got a sticker with it.
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.
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
Item as described and perfect fit and arrived on time
Battery arrived in a good shape package strait to my door steps
Arrived just in time to power my generator here in the cold Maine winters. Excellent service!
Arrived quickly from WALMART.COM. Perfect size and proper placement in my generator. Installation was easy. Generator fired right up. Battery came fully charged.
New battery. Ready for cold weather!
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
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