There are a lot of third party batteries available out there, and while I am definitely cautious about buying a battery from a company that I do not recognize, I do know the K&F name so these were a bit less questionable to try out - and, hey, I could always use spare batteries since these run out so quickly when out shooting photos.

These came nearly fully charged, so I was able to run them down until depleted and then charge them via the USB-C port on them. They charged quickly and without issue, and they didn't give me any trouble when using them in my cameras.

The quality looks as good as OEM, but I will say that I prefer the look of these over the OEM fuji batteries - they just look more premium to me, and the added benefit of being able to charge them via USB-C is definitely a nice upgrade (and something that I have with my other camera body batteries). These will also charge in the regular plugin style charging cradles without issue, if you prefer.

From what I can tell, there's no real difference at all between the life of these batteries as compared to OEM (meaning that they last just as long when in camera as the Fuji branded ones). In fact, other than a nicer look and extra feature, I can't tell any difference from the batteries that came with my cameras so it really is a no brainer when it comes to whether or not to get these - and it's a two pack so that's pretty sweet, too.