Rated 4.53 out of 5 based on 15 customer ratings
(15 customer reviews)

$24.99

12V 9Ah Compatible Battery for APC BACK-UPS NS1250, NS 1250

SKU: ML9-12106 Category:
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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: F2
Battery Dimensions: 
5.94 in x 2.56 in x 4.02 in
Weight: 5.10 Lbs
Warranty
1 Year
Multi Packs Bundled Savings

1 Pack, 2 Pack, 4 Pack, 6 Pack, 8 Pack, 10 Pack

15 reviews for 12V 9Ah Compatible Battery for APC BACK-UPS NS1250, NS 1250

  1. Rated 4 out of 5

    Albert B. St Md

    Was right size worked and less expensive

  2. Rated 5 out of 5

    Meowskers

    I used this battery to replace a dead one in an APC UPS-550 that I found at Goodwill. It works perfectly. The connectors are the .250 that you need (I saw people complaining on other batteries that had .125 connectors). So far no issues. I will update my review if anything unexpected occurs.

  3. Rated 5 out of 5

    Doug Stone

    I used this battery to replace a dead one in an APC UPS-550 that I found at Goodwill. It works perfectly. The connectors are the .250 that you need (I saw people complaining on other batteries that had .125 connectors). So far no issues. I will update my review if anything unexpected occurs.

  4. Rated 5 out of 5

    P. Patel

    Ran a test and worked fine in my APC Back-UPS 1250.

  5. Rated 5 out of 5

    Robert Dockham

    It fits my APC backup and seems to be working fine

  6. Rated 5 out of 5

    D. Lyman

    Works great. no problems

  7. Rated 4 out of 5

    Bill in San Jose

    1 Month so far, all good. Fit my AT&T ONT box perfect, spade lugs are the correct size.

  8. Rated 5 out of 5

    jomebrew

    It puts out without input. Johnny 5 would struggle without input but not the Mighty Max.

  9. Rated 4 out of 5

    TXShotgun36

    Worked as expected

  10. Rated 4 out of 5

    TXShotgun36

    Worked as expected

  11. Rated 5 out of 5

    mb#1

    My APC Back Up is now back up and running!!!

  12. Rated 5 out of 5

    mb1

    My APC Back Up is now back up and running!!!

  13. Rated 4 out of 5

    Mason

    Silly me. I thought when I bought his 2 would come because that is what is needed. It was only one. So if you get this, make sure if you need 2 get the pair. They seem to work fine.

  14. Rated 3 out of 5

    Thomas Finch

    Works as expected

  15. Rated 5 out of 5

    Ron Sink

    Works great. It seems to function just as the original battery did.

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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