Rated 4.75 out of 5 based on 4 customer ratings
(4 customer reviews)

$18.99

12V 3AH SLA Replacement Battery for Cyberpower CP425SLG, CP425G

Availability: In stock

SKU: ML3-129172 Category:
Delivering power when you need it, the Mighty Max ML3-12 12 Volt 3 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 ML3-12 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: 3 AH
Chemistry: SLA, AGM
Terminal: F1
Battery Dimensions: 
5.28 in x 2.64 in x 2.64 in
Weight: 3.20 Lbs
Warranty
1 Year
Volts

12V

Amp Hour

3Ah

Chemistry

SLA / AGM

Terminal

.187" – F1

Quantity

1

Length

5.28

Width

2.64

Height

2.64

Weight

3.20 Lbs

Warranty

1 Year

4 reviews for 12V 3AH SLA Replacement Battery for Cyberpower CP425SLG, CP425G

  1. Rated 4 out of 5

    Alm

    It is larger than the designated room inside. BUT this room is made of several thin plastic tabs because 425 box itself is huge inside. Soooo…. For those lamenting that it’s too big, doesn’t fit, fraud etc – take pliers and twist-break a few tabs. Place the battery as it was – with contacts to the side, and see which tabs need to go. Grab the tab and twist, it will break. Takes 30 minutes if you are not mechanically inclined, 5 minutes of you are capable. Fits tight and neatly in the same position as the original battery. Pros – few times cheaper than the correct battery. Cons – you have to do some work. No worries, next battery will likely be same big.

  2. Rated 5 out of 5

    John Morelli

    Worked as intended

  3. Rated 5 out of 5

    P. Carey

    Slightly bigger than old battery. I just had to break a couple plastic retaining spacers and then the battery fit right into ups case. It charged up and I tested it to make sure it works when the power is cut off. Alot cheaper than buying a new ups. The plastic spacers were easily broken in the ups case with a household pliers.

  4. Rated 5 out of 5

    Thomas S

    Update:The supplier: Mighty Max Battery, reached out to me and sent me a replacement battery, which definitely does have a better run time. I have changed my two star rating that I had originally gave the item, to a 5 star rating. Not so much for the product, because that still may be a hit or miss issue but 5 stars for their customer support/service.The battery’s fully charged run time is not very long, in fact, this replacement battery (Mighty Max) last as long as the dieing original 8 year old Toro battery it replaced (in a weed whacker). I was hoping that a few charging cycles would improve this issue but so far not yet. Not all that happy with the Mighty Max Battery.

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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