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

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. Read more

I ordered two of these batteries to replace the originals in my Cyber Power battery backup. I received them overnight through Amazon Prime. They were a perfect fit and easy to install. So far they work fantastic and I highly recommend instead of the manufacturer's higher price batteries. Read more

Used this to replace the battery in an 800 VA Amazon Basics model ABST800 UPS /surge protector. The batteries in these things wear out but you can replace them in 5 minutes. (Now to find out where to recycle the used battery) Read more

Works as described, its a replace to another battery (7ah) purchased by this company. I wanted something with more power. My last one started not holding a charge this summer after a little over a year of use. It did survive during technically two* Texas summers and a winter. I do like this company and have several of their batteries. Read more

This is my second Mighty Max SLA battery that I've purchased in the last year. The first is in my Honda Valkyrie, and it has been solid and reliable, even though that motorcycle does not get ridden very often. I rarely put it on a charger as it holds it charge well. Read more

Fits my UPS perfectly, have bought a number of these for other UPS's. About the same as the original. Great value and quality. No problems so far. Read more

Item came in really quick with no issues, works awesome straight from the box. Would buy this again from this company in a heartbeat! Read more

I have a CyberPower CP1500AVRLCD -- apparently shipped in 2017, I didn't know it was that long -- under my desk. I was sitting here minding my own business, and it started beeping, it lit up the word 'fault' and said "E02". That translates to "Charger Error". I contacted CyberPower, they answered quickly. The two causes are, the charger failed, or the batteries are bad. It's an easy test - remove the batteries, plug the unit into the wall, and test the voltage from the battery wires. On this unit (2 batteries), it should be more than 24 volts. It was. CyberPower recommended their replacement battery kit, for $120, which is almost the cost of a new unit, which they recommended, because reasons. I've bought MightyMax batteries before, and they don't disappoint. I ordered a 2-pack, but got the dreaded "We can't ship this now, click here if you still want it and we'll let you know when its available". Cancelled, and ordered this 4-pack instead, still way less expensive than OEM and now I've got extras. They arrived in a single box, with 4 individual boxes inside, minimal extra packaging. I installed two of them in the UPS -- Perfect fit, the UPS powers on with no issues or complaints. UPS restored. I always love it when things turn out right. I wrote the date on the new batteries, and buttoned things up. Read more