

🔋 Power up your gear with confidence — never get caught powerless again!
The Mighty Max Battery 12V 9Ah SLA Replacement Battery 2-Pack offers high-capacity, maintenance-free power with UL certification. Designed for reliable performance in CyberPower 1500 AVR systems and similar devices, these spill-proof batteries withstand shocks, vibrations, and extreme temperatures. Compact and easy to install, they come with a full one-year warranty, making them a smart, durable choice for professionals who demand consistent uptime.





| ASIN | B08BZTSP38 |
| Batteries | 2 12V batteries required. (included) |
| Best Sellers Rank | #109,266 in Health & Household ( See Top 100 in Health & Household ) #257 in 12V Batteries |
| Customer Reviews | 4.6 4.6 out of 5 stars (265) |
| Date First Available | October 13, 2022 |
| Item Weight | 11 pounds |
| Item model number | ML9-12MP251124741014 |
| Manufacturer | Mighty Max Battery |
| Product Dimensions | 5.94 x 2.56 x 4.02 inches |
B**.
Perfect for the Burromax Dirt Bike!
I bought this battery pack to replace the battery on my kid’s Burromax dirt bike, and it works great! The installation was simple, and the bike runs like new again. The power holds up well, and my kid has been having a blast with it. It’s a solid, reliable replacement, and the two-pack is a great value. If you’re looking for a dependable battery for similar needs, this is a fantastic option on a budget!
G**L
Perfect replacement
Perfect replacement. No issues. You'll have to give me a few more years to report anything negatively about longevity though!
J**.
Perfect choice
These fit perfectly in my CyberPower 1500PFCLCD UPS. It is back to working great with these batteries. They arrived quickly, and in great shape. Well packed as you can see the heavy cardboard box and the 2 inner cardboard box that is surrounded with a dense foam. These were tight in the inner boxes so no movement inside. Price was better than the competition and I have had good service life with MightyMax batteries in the past.
R**N
Possibly old or defective batteries, repleced by company
Installed batteries into cyberpower1500 on 1/10/2024. Initial voltage 12.97 for both batteries. Let charge for 48 hours before use, maximum capacity per front panel 80%. Now the batteries show 0% and won't hold charge. Requested refund or replacement. Awaiting company response. Company responded to me within 2 days, which is their policy. They agreed to send 2 more batteries which arrived within ten days. The voltage measured for both was now 25.06. They seem to be performing adequately. I'm raising the rating 4 stars.
S**E
Great price for Great batteries
Title says it all. Also easier to install than previous replacements, snug but not too tight. Shipped in solid packaging so arrived in perfect condition, they also included a return label just in case the pair needed replacements. My CyberPower 1500 is 9yrs old, the original and replacement batteries lasted 4.5yrs each hoping for the same with this pair. I'm also taking advantage of the additional warranties.. registering the batteries (+3mo) and a review with pics (+3mo). Highly recommend, will update if needed or when these are retired.
C**G
Perfect fit, excellent value
Perfect fit for my old CyberPower CP1500, and an easy swap! I have no way to test the 9Ah claim but if true that would increase the run time over my old ones, extending the battery life. They arrived 80% charged and then topped up without an issue. They've been in now about a week. Appear to be of great quality.
S**I
Installed in my Cyberpower 1500, and it's like new.
My Cyberpower 1500 UPS has recently been looking at me as if to say "Battery? What battery?". If we had just a slight hic-cup in power (which is happening with increasing frequency), my entire system would go down. It was almost as if I didn't have a UPS, and was only on wall-power. So I ordered these replacement batteries in hopes of reviving my UPS, and they have worked like a charm. The installation was a little hairy, due to short wire lengths and glue where it shouldn't have been, but that's not the fault of MightyMax. Once I got the old batteries out, these went in like a dream, and the UPS is estimating I have over an hour of run-time. So I'm very happy. Side note: You'll know when the batteries have been delivered. Just wait for the bang of the driver setting down the box, then the scratching of pen on paper as they fill out their workman's comp form. ;) In other words, lead acid batteries are heavy! Be aware.
J**Y
Worked like new - Cyberpower 1500VA - AVR
After a few years, my UPS would power off randomly. It seemed to be doing a self-test and then dying. I replaced the original batteries with these, which has fixed the problem. Be aware that the Cyberpower 1500VA requires two (2) batteries, so you'll need to replace both. The second one isn't spare. Installation took about 10 minutes. There are good videos on YouTube on how to replace them. There are two different versions. One has one screw to remove the front panel. Mine had two screws. There are videos for both types. Silly input, but remove the plastic covers from the new batteries before trying to attach the terminals. The original batteries had plastic covers you slid the terminals under. These just come off, and the plastic on the cable protects the terminal. I have yet to use their customer service. Still, it impressed me that they included instructions on returning them if there was a problem (you can't usually return UPS batteries through Amazon). If there are problems, I'll try to update the review, but I'm happy for now.
R**B
Replaced the original batteries and working great.
A**R
Works and the great customer service is a bonus.
B**I
J’avais des problèmes manques ampères pour mon APC qui n’avait pas efficacité en temps sans électricité ! Il mon renvoyer de nouvelles batterie et tout va beaucoup mieux!
D**R
Parfait pour redonner vie a mon vieux ups cyberpower 1500 va reste a voir combient dannée il va durer avec cest batteries mais je suis tres satisfait a date
N**U
Fits like a glove and no my UPS works again. That's all I need
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