12V 9Ah UPS Battery Replacement for APC BE550G

(37 customer reviews)

From: $24.99

12V 9Ah UPS Battery Replacement for APC BE550G

SKU: ML9-12101 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

37 reviews for 12V 9Ah UPS Battery Replacement for APC BE550G

  1. gary d. (verified owner)

    exactly what I needed and received it on a real timely basis and the cost didn’t clean me out, either

  2. knitting ninja

    This battery installed in less than 5 minutes. The terminal connections fit perfectly. Unit performs as expected after install.

  3. JKBinVA

  4. KBC

    So far so great. I will update if any problems develop. So far meets or exceeds my hopes.

  5. Jabiru

  6. Saurabh Sen

    This 12V 9Ah replacement battery for APC BE550G was 2 minute easy installation and a perfect fit. Do not know how long it will last but it came well packaged and looks decent. Customer support was great to resolve my issue.

  7. Rob Bartel

    Working great so far. Only installed them a couple weeks ago and everything went smooth and are working great.

  8. Golden Guy

    I bought this 12V 9Ah UPS Battery Replacement for APC BE550G and was at first skeptical if this MightyMax battery would work well, but so far I am pleasantly surprised. It fit my APC UPS like a glove, was well packaged, easy to connect, and after a few weeks is still working well. I haven’t had it long enough to determine how long it will last, but am optimistic at this point. I usually pay over $40 for a replacement battery so this is an outstanding value! I’ll buy it again!

  9. Allan

    Easy to install, great price.

  10. Overlord55

    Perfect replacement!

  11. Scott

    More powerful than the RPC battery I replaced and was an exact fit. I didn’t know how to answer the longevity question since I recently purchased it and don’t know how long it will last.

  12. Michael

    Direct replacement for the battery I was replacing in my Cyberpower UPS unit.Had an issue with battery, resolved very quickly. Excellent customer service!

  13. JB

    Have an APC BE550G UPS & almost ashamed to admit I’d let the OEM battery run for over 8 years, which I guess is a testament for APC’s quality. The failure left me in a very tentative situation, as the UPS was responsible for our modem, router & voip phone connections (all very important to us). We needed to remedy the failure reliably and at a reasonable price as soon as was possible. The Mighty Max Battery arrived quickly & works perfectly – installed without a hitch. — Would highly recommend this product.

  14. Customer

    This battery fit perfectly in my APC BE550G UPS.

  15. Customer

    The Mighty Max Battery was the exact replacement I needed. It was less costly (battery + free shipping) than the APC RBC 110 replacement for my UPS. It also has a higher 9 Ah rating than the stock battery’s 7.5 Ah. It match’s APC’s 1 year warranty, but also provides a 30 day refund policy in case you ordered the wrong size. Now I have to see if it has the same anticipated longevity (3 – 5 years) as the original , which is why I gave it 3 stars for longevity as I hope it will last 3 years, but only time will tell. So far so good!

  16. noname4

    Easy to instali

  17. g

    These are brand new batteries made in Thailand. Shipping was vey prompt.

  18. Logistics Guy

    After 8 years the OEM battery in our UPS failed. This battery fit perfectly and was in service as tested two days later with no issues. We went with a 9AH vs the 8AH that was originally installed in our unit as the 9AH fit and will theoretically last a little longer.

  19. brett

    I gave it 5 stars because I?m happy with it but I don?t know about the longevity yet. I bought this as a budget power wheels battery replacement. After getting everything wired in it worked perfectly. No over heating or anything. I would recommend this as a suitable replacement for the power wheels batteries at less than half the cost.

  20. David Z

    We use this UPS for a TV,DVR,and Roku. It fit like a glove and I had occasion to use it a week after it came in and was installed. We lost power due to a storm and I turned off the TV and it kept the DVR working for the hour it took for the power company to restore power.

  21. JamesW

    I needed a new battery for a UPS and this fit the bill.

  22. Chuck

    Battery arrived ahead of schedule. Battery fit perfectly in UPS unit and connectors fit tightly without any adjustment required. Arrived almost fully charged and has been working fine since I received it a few weeks ago. Very satisfied with the overall transaction and will purchase again when needed.

  23. Peter

    I took the APC battery out and put the Mighty Max batter in. I took about a minute. A perfect fit

  24. diy1000

    Works

  25. Customer

    I’ve only had this battery for a month, but so far, no issues. The battery was the right size for my UPS, with the correct terminals. The UPS didn’t complain on power-up. Haven’t had to go to battery power for lack of commercial power so I can’t address performance. Will provide update later

  26. Daniel Martinez

    This battery is not completely compatible with BE550G. It has different size battery contacts. I had to spend about an hour, and improvise, to connect the APC to this battery

  27. Eric Parrow

    used in an APC 750 to replace the battery. works well.

  28. Euclid

    Working perfectly in my old APC UPS!

  29. Bernie Bridget

    Installed without a hitch and is working perfectly.

  30. John J Stalker

    Seems to work fine although I haven’t had to rely on the UPS yet.

  31. Marvin

    Product came sooner than expected and reached from the East Coast to Los Angeles in three days. The terminals are not as robust as the original APC battery causing the positive terminal to fall off when inserting the battery. After I understood what was happening, I was able to use a tool to make sure the positive cable stayed on and then pushed on the negative terminal once the battery was in the APC case. If the terminals were a little longer or had a different clip I would have given it five stars.

  32. Milkman

    Did the job!

  33. Kev Miz

    Excellent replacement battery for my APC BE550G UPS. Took 1 minute to remove and replace the old battery that was beeping to let me know it was not holding a charge anymore. Connections snap on tight and the fit is accurate.

  34. kaleidoscopekid

    Excellent buy. Perfect replacement so far, despite all the scare-tactics of APC trying to force me into buying an entire new back-up unit. Using in APC ES 550. Shipped fast. Good packaging.

  35. Andi

    A lot less expensive than a whole new battery pack. Ordered 2, they work like original.

  36. KM

    Excellent product, perfect replacement for my UPS battery. Good price, fast service.

  37. BBD

    Works as expected – easy to hook up and works like a charm!

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

Mighty Max Battery
Excellent
4.8
Based on 452 reviews
Mighty max brings the battery backup back.
Arrived well packed in unopened sturdy box. Was replacement for identical Mighty Max battery I ordered 2 years ago. Taking 1 star off because didn’t include the needed terminal clips - was able to use the old battery’s clips
Same model fits in each of our four wheelers great product
Replacement for my Murray MT100 riding lawnmower. Murray does not make replacement batteries and you are on your own if the battery goes bad. Bought Murray MT100 in 2023, battery went bad in 1 year and all other Murray replacement batteries are LARGER so it won't fit.This Mighty Max Battery fit the MT100 fine and it starts it perfectly too.
Direct replacement for generac portable electric start generator. Works great.
Received really quick. Boxed well and fit great. Worked like a charm! I would definitely recommend this battery.
As an athletic trainer I rely on our water units every day to provide the water to our athletes. We have over 900 student athletes enrolled, and these units get used daily, so it is imperative these batteries are reliable. On a side note, I also use these batteries on my fishing kayak to power my fish finder. I can use my fish finder for about 20 hours before it turns off. These batteries are great! Highly recommend. I have not had any issues so I haven't spoken to customer service yet, but if they are as good as these batteries have been, I think I am in good hands.
Needed a replacement battery and the manufacturer wanted $50 whereas you only required $20. Made it worth it!
satisfy with price and easy installation.
Arrived in great condition comes with the bolts to attach the wire over all very satisfied
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