I’ve had a pair of Ravpower batteries for almost two years now, and I haven’t had any problems with them so far… They drain fairly quickly in the cold, but even that was only a few less minutes than the original battery. I suggest you check them out. Not sure if two years of experience with them is going to be enough to determine that though.
And I’m not sure if B&H Photo sells them…
I am looking for an off-brand battery for my Nikon Z50, but at this point there isn’t any that I could see.
Because the original ones are like $70 at this point. 🙁