Mighty Max BatteryML7-12 - 12V 7.2AH Replacement UPS Battery for APC Back-UPS 550 BE550G

I've bought several of the Might Max batteries over the past few years. They've been used in everything from kid's ride on tractors to alarms to UPS devices. Actually bought this one as a replacement in an APC BE550G.Most people check the length, width, and height of the battery before they order it. But you also have to PAY ATTENTION TO THE TERMINAL SIZE !! The APC BE550G is a perfect example of why that is true.Apparently APC, in its infinite wisdom, produced different versions of the BE550G. Some came with connectors for F1 terminals on the battery and others came with connectors for F2 terminals on the battery. An F1 terminal is 3/16" wide while the larger F2 terminal is 1/4" wide. They are NOT interchangeable. I made that mistake and learned the hard way. If your UPS has F2 connectors, they will NOT correctly attach to a battery with F1 terminals and vice versa. The terminals on the UPS and the battery must MATCH. Might Max is very good about telling you which size is on every battery they sell.Some reviewers have blamed Mighty Max for the fact that the battery they ordered was not identical to the original APC battery. Do NOT blame Might Max, the problem was created by APC. To make matters worse, Amazon does not accept returns on batteries if you discover that the battery you ordered has the wrong terminals.But all is not lost. Might Max is a rare company in the Amazon world. They have a New York based customer service center that actually answers the phone and is ready to help you solve any problems you run into. In my case, they offered to send me two tiny little F1 to F2 adapters for free. Seriously, what other company would ever do something like that for you?They send them by US mail so it takes about 10 days for the terminals to arrive, but hey ... they're doing you a HUGE favor here. One the adapters arrived, they fit perfectly, the battery dropped right into place, and worked like a charm.So, don't hesitate to use Might Max batteries, they're top quality. And please do yourself and Mighty Max a big favor by double checking the size of terminals/connectors you need ... smaller F1 or larger F2 ... BEFORE YOU ORDER. Just because Mighty Max will help you get out of a jam ... let's not abuse their good nature.

It works

This Mighty Max ML7-12 battery was exactly what I needed! My APC Back-UPS BE550G was completely dead, and I wasn't sure if a simple battery swap would fix it. Installation was straightforward, and as soon as I powered it back on, the UPS came back to life. It's been working reliably since. This battery works sufficiently and perfectly restored my UPS function. Highly recommended if you need a replacement for this model!

Ordered by mistake but very easy no cost return.

Works as advertised

Just as good as the battery before

Purchased this battery on October 2, 2023 and it died last night, right before I was to give an online presentation, April 15, 2025. I expected it to last longer. I wish there was a way to tell when the battery is getting low so I can replace it in time to prevent it dying when I need it most.

Great