ML9-12 - 12 Volt 9 AH, F2 Terminal, Rechargeable SLA AGM Battery,Pack of 1

This was an excellent battery for my old Uninterruptible Power Supply (UPS). It is a CyberPower CP1000AVRLCD that has been reliable for years, but has recently failed even during brief power glitches. .My testing showed that the UPS would not support any load when commercial power failed despite the projected 30+ minute estimate displayed on the UPS screen. (I had mistakenly trusted the projected runtime on my UPS screen, but I guess it can be inaccurate when the battery goes bad).Various websites suggested a worn out battery was likely and that the batteries only last a few years.The UPS manufacturer lists OEM battery model RB1290 as the replacement, but it is ~2x the price of this battery.I debated purchasing a whole new UPS, but I took a chance with this battery and spent less than 20% of a new UPS.I ordered this Mighty Max battery because it was available for overnight delivery and was reasonably priced compared to the manufacturer's suggested OEM battery. This replacement battery appears to be identical to the original battery in both electrical specifications and physical size.I'm very pleased that this battery was a perfect fit and took under five minutes to install!After installing this new battery, the UPS works perfectly again!

I am using 24 of these batteries at this point and about to invest in 48 more so. I have tons of equipment, and anything worth a darn is behind a UPS for clean power and to survive the occasional blip in power.In the last decade, I literally haven't replaced a power supply in anything at all except a TV once because I took a surge through the cable line I forgot to protect. The clean sinewave coming off of a good UPS ensures me maximum life from power supplies and other delicate components, protects my equipment from surges, and at the heart of it all is the MightyMax battery.I've been using the ML9-12 for all my UPS 650, 600, Network 40, and similar gear. I even build my own packs for larger installs like my 2200s and 1500s. MightyMax is the best battery money can buy, performing well over it's cost point. Don't buy expensive batteries from the UPS manufacturers. Yes, those batteries are great, but you can save money and not skimp on performance using MightyMax batteries.I have done extensive testing, being I'm a geek like that, and here is what I have found:1. They really are 9AH, just a tad over. With a lot of testing, I am getting on average 9.6AH out of these batteries. I have never gotten under 9.2 and never more than 9.9. I have had other batteries claim to by 9AH and I get mid-8s which is horrible and deceptive. Not with MightyMax, whatever it says they are, they are.2. They age really well. These batteries age well for their price. Realistically most cheap UPS replacement batteries last a year to 18 months or so and you replace them. The originals usually last around 4 years "on the shelf" meaning they rarely if ever actually get used. With no more than 1 deep discharge per year, you'll get right near that 4 years. The MightyMax batteries last around 3 years with the same "on the shelf" type usage but they are 1/3rd the price so I'm making money with "on the shelf" usage.3. In areas more prone to outages that may cause deep discharges (like where I live), the OEM batteries last no more than 2 years when deeply discharged 6+ times per year. Sometimes the OEMs only last 18 months. The MightyMax batteries last 18 months or a bit more like this so they aren't quite as strong as the OEM batteries but they are close enough that at 1/3rd the price it is totally worth it.4. These batteries can dump serious power. They handle a great discharge rate (C Rate) right on par with OEM batteries, in fact, the MightyMax actually fair a LITTLE better in this aspect, however not enough to write home about, but again, 1/3rd the price.... you seeing the pattern?Tips and Tricks:1. The internals of the older APC UPS 600 are actually better than the internals of the new 650s IMHO. The difference from being a 650 or a 600? The battery realistically. Use this 9AH battery in an APC UPS 600 and magically you've got a 650. This battery fits perfectly in the 600 which usually uses a 7AH battery. I haven't seen any issue with Power Chute or anything reporting incorrectly and the charge rates seem to be relatively consistent.2. The Network 40 ACP UPS has a little riser in the bottom (it's part of the molded plastic). If you cut that riser out you can fit one of these ML9-12 batteries and bingo, you have a APC 650! The battery charge rate is SLIGHTLY slower than the 650 from the 4 I measured but the parts look identical and I have seen no adverse effects during a power outage and run time is consistent.3. If you have a battery that got a few deep discharges and seems to be shot, you can try using a desulfate mode on a small charger to revive the battery. I've done this with a few batteries that seem to have prematurely died before their time and it works in about a quarter of the cases. Since these batteries charge low and slow inside a UPS, sit topped off all the time, and always have a charge, they don't sulfate much, so this doesn't work all the time, but every once in a while you can revive one the ups is complaining about. These revived batteries seem to last another 6 months or so in my testing.OVERALL: Absolutely worth it. Go with MightyMax batteries every time.

Fantastic product. This is the third battery I have purchased from Mighty Max. The packaging was solid and registering for the warranty was a breeze. In addition, the battery was 100% compatible with my battery backup and the installation was very simple. I am super happy with my purchase and would highly recommend this product.

**UPDATE**MightyMax contacted me via email to let me know that " (you) had selected FBA option, which means Amazon has fulfilled your order directly from their facilities and they are responsible for all customer service issues". They provided an Amazon 800 phone number. I called the number provided and spoke with and Amazon representative who promptly refunded my money. As battery is damaged it will go to local battery recycling center.**Original post:**I received the battery in a corrugated Amazon shipping box, which was undamaged. The battery product packaging is also a corrugated box, and is dented on two 'bottom corners'. The battery is likewise is damaged/dented on two bottom corners, making it unsafe/unusable. After 5 days & 3 emails requesting product 'support' (i.e. a replacement) on the MightyMax website (which is the only support option Amazon provides), and also replying unfavorably to a 'how did we do on your product support' request from Amazon, I've yet to hear from the supplier. So as far as a review: Features - dunno stars. Easy to Install - dunno stars. Value for money - 0 stars (so far). 0 stars (so far) for the entire product support process from both Amazon and Might Max.

Bought it for my monster 360 radio speaker all the one blew out had it for about a year I replaced it and working just fine and great and dandy.

Was good when it worked but lasted about a 1 1/2 -2 years before it went completely dead. I’ll give 2 stars but should have lasted longerUpdate: changed review cause I don’t think it’s the battery itself. This looks to be the circuit board not able to charge the battery any longer. I’m changing to 5 stars

My go to brand for replacement ups batteries. Has worked every time!

The battery is a direct replacement for the battery in my Tripp Lite UPS. The battery was about 90% charged when received and charging was completed overnight. I cannot comment on durability, but the UPS is now functional. Presently, I would say that it is a good value for the money. I have to note that this was the second battery that I received. The first one was clearly already RMAed by another customer. A replacement battery was received quickly.