I got these batteries for the convenience of charging via USB. I wasn’t expecting much out of these as they’re lower capacity than the original Fuji batteries (1050mAh vs 1260mAh). Most third party batteries over state their capacity but in reality perform around 10% less than the genuine manufacturer batteries in my experience. I was expecting these to perform around 70% or less but to my surprise, these performed very well at over 80% of the OEM batteries. My OEM batteries are old so they probably don’t perform at their peak performance but to have spares that are USB rechargeable is priceless. Highly recommended.

The battery last about the same as my factory battery in normal daily usage, I like the fact that I can recharge the battery using USB C , the best part is that for about half the price of OEM battery, I got two instead of just one. Last picture show how it fit in my X100VI battery compartment.

I've been looking for some of these for a long time. A battery for my Fujifilm cameras that can be recharged in the field directly from USB-C K&F have delivered. Don't have to carry a charging block or even more spares when traveling. Just recharge with a C cable like everything else. Oh, and they look cool in white/grey unlike boring black

Works!
Charging is very convenient. Via charger or via built in USB charging port.
There is LED indicator that shows RED when being charged and GREEN when fully charged.
Good battery for X100VI.
Good value at 2 pieces.
Highly recommend.

I love having these batteries with the USB-C connectors built in. Now I can charge the batteries just with any USB-C charger. Perfect when I travel, I don’t need to bring different chargers for different batteries. These seems to be pretty good quality lasts pretty much all day on my x100vi camera.

Great batteries for your Fuji X100. I like being able to use a USB C cable to charge them externally as well.

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.

I quite like the K&F Concept line of batteries—and these NP-W126’s are no exception—because of the integrated USB C charging ports. It makes for one fewer type of charger to worry about. However, there is a price for that convenience: these batteries are rated for 7.77Wh, which is 0.97Wh less than the official Fujifilm-branded battery. All in all, on days where I’m going to be doing a lot of shooting, I’d rather carry around an extra battery than an extra charger.

K&F Concept’s NP-W126 NP-W126S battery set is an essential backup for Fujifilm camera users, delivering impressive longevity and fast charging via USB-C. The batteries work seamlessly with models like the X100V, XT30 II, and XE4, maintaining a steady charge that rivals Fujifilm’s original batteries. The USB-C fast charging feature is convenient, allowing both batteries to be fully charged in just a couple of hours, perfect for on-the-go photographers.

The only minor drawback is the lack of a built-in charge level indicator on the batteries themselves, which would be helpful for quick checks. However, the high-capacity performance and rapid recharge capabilities more than make up for it. This two-pack is a must-have for extended shoots, providing peace of mind and eliminating the fear of running out of battery mid-session.

These batteries are compatible with a wide range of Fujifilm cameras, from the X-T30 II to the X100V and many other models. Compatibility has not been an issue, they fit perfectly and work straight away.

In terms of performance, there is no noticeable difference from the original batteries. The lifespan is similar and they do not fail during use. Even aesthetically, they have a very careful finish, especially in the joints of the casing.

One of the most notable advantages is that they can be charged directly using USB-C, which makes things much easier, as they can be recharged by connecting them to the laptop, a charger, the USB port of the car or a wall charger. In addition, if preferred, they are also compatible with traditional Fujifilm chargers.