Bought this in July 2020 to replace an original Roomba battery for my 880. It worked great until recently. My Roomba runs three times a week, while I'm at work. About two weeks ago, I came home and found it had not made it back to the dock. It didn't make it back on the next run, or any run since. It seems it now just dies completely at some point during it's cleaning cycle. Obviously a new battery is needed, but I think I will try a different brand and see if I can get closer to two years of use it of it.