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!

This is second set of replacement batteries for my cyberpower cst135xlu UPS. Orig purchased 2017, orig batteries lasted 4+ yrs. Bought a different brand of batteries in ‘22 that lasted until recently when PC run time was down to zero during an outage. Self test showed batteries were at fault. So decided on these batteries based on overall good reviews. Hopefully these last longer than the 3+ yrs I got from previous brand. Out of the box they appear to be fully charged, UPS shows 100% capacity and a self test passed - a good start!

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.

This is the second one I've bought. The first one lasted just a few weeks over 3 years in my APC 550-ES UPS

This Battery is great and works very well.

perfect fit and easy upgrade

This is a solid agm battery. I use it for a backup ups. I choose the battery with the highest ah for the same size that the ups came with. So instead of a 7ah bat I choose a 9ah bat. This makes the ups have a longer run time since 9ah is a larger capacity, but the same 12v. Prices are usually about the same too.

Works great exactly as described