I’ve been using Patona since my first camera, ten years ago.
Currently, I own one Canon LP-E6NH, two Patona Protect LP-E6NH, and one Patona Protect LP-E6P.
In the past I also had a Jupio LP-E6N Premium. Nothing to complain, I had it for like five years, but in the meantime I bought the R6, so I moved on to LP-E6NH.
I’ve said this before: I have no issues trusting batteries from brands that are actually battery makers. It’s their area of expertise.
I like my Patonas Protect more than the original Canon’s, because the third parties have extra capacity. Plus, Patona is a battery maker, Canon is not AFAIK.
But I definitely trust a lot more on batteries from battery makers than from “accessories brands”, like Smallrig, Neewer, K&F, you name it.
I don’t care much for conveniences though. I buy the top of the line the brand I like has to offer. My Patona batteries take longer to charge than Canon’s, but it’s just what it is, since they also have larger capacities.
A genuine Canon battery ensures us the best absolute compatibility with our cameras, because they’re the ones coding them. As for the quality of their cells and BMS, we know next to nothing. We know, from experience, they’re decent, but nothing tells us they really are the best.
Some third parties at least let us somewhat know what’s inside.