I installed two in an APC UPS and it has been working perfectly for a year now, so so far I am satisfied.

It is used in a standalone system for lighting, in combination with a 40W panel. For lighting needs of 12W for 2-3 hours per day, it fully meets the requirements and there is also a safety margin.

The battery died after 2 years and the UPS shut down immediately during the first power outage (it didn't even last 5 seconds) - what bothered me is that it leaked liquid from the negative pole (black) and corroded the metal terminal of the cable - it destroyed my UPS - never again - I do not recommend it

I replaced it in the PT 850 and tried it without fully charging it on a television with an indoor antenna. It lasted for 18 minutes....something is better than nothing. For a final price of 15 euros, it is decent and I am satisfied!

I bought it years ago and at some point it broke due to my own mistake.. I bought the same one again.
So far, I haven't seen anything negative during a few power outages. I believe it will last 2 to 3 years, after that all batteries need to be replaced.

I bought two batteries on 25-09-2020 and installed them in a UPS. With the first rain (around 15-10-2020) there was a power outage and the batteries lasted about 5 minutes until the UPS started acting crazy (an indication that the batteries are about to die very soon).

During the earthquake (Samos 30-10-2020), the shaking begins, a few seconds later the power goes out, I think "the power is out" and immediately after the UPS squeals once and collapses, taking the computer down with it.

I try again later, turning off the main switch without having the computer on, and within a minute the UPS turned off (stopped squealing).

The watermelon was a dud.

I give it 5 stars because I trust the store that recommended it to me... However, I will come back when it needs replacement (because then I will know its durability over time - which determines 90% of its value as a battery) so that my rating can be more accurate.