A camera battery with a USB-C charge port built in.

A BATTERY WITH A USB-C CHARGE PORT BUILT IN.

This one is for Fujifilm X-T4, X-T5, X-H2, X-H2S, and I can't even wrap my head around it. I've been bringing my charging block with me for as long as I can remember. It's just one extra thing I don't want to have to carry when I'm out in the field on assignment. Now, I don't have to.

And this battery has almost the capacity of the official OEM battery. Almost, but these batteries generally last most of the day. It's close enough. And already, I digress...

A CAMERA BATTERY WITH A USB-C CHARGE PORT BUILT IN.

Some things are just well-designed, built by photographers, for photographers.

This is one of those things.

The thing I like the most about this battery is that I can recharge it in my car with just a USB cable; no need to take along a battery charger. It's a small thing, but I have enough trouble remembering the equipment I need for a photo safari. One less thing is helpful.

It also works well in my Fuji GFX 100S. Just like the original equipment. I can't say if it takes the same number of shots as the original, but it's close enough for me.

It arrived with a charging cable to boot. Overall, I'm pleased.

We are using this with our GFX 50 SII alongside two Fuji brand batteries. So far, they appear to perform the same, with one significant difference: the K&F Concept can be charged with a common charging cable. It has Type C Fast Charging, making it very convenient, especially when in the field. This is a brilliant feature. We wish all camera manufacturers would adopt this ability.

This battery is just as good as the OEM battery for photography. I can just about as many shots out of this battery on my X-H2 as i do with the OEM battery minus a handful. There is a slightly noticeable difference when running video on this battery as it gave about 20 mins less record time than the OEM. This wasn’t a scientific study and other factors may have played into the shorter runtime such as camera temp.

The white color of the battery is a nice touch to the traditional boring black batteries. This color makes your K&F battery stand out amongst the rest. The usb-c port allows for you to charge on the go without the need of a charging station.

It's supposedly larger capacity than the OEM battery, but it seems debatable that it actually lasts longer in the field. The beauty is that it recharges with just a USB-C cable, but it can also be recharged in a standalone charger or in the camera. Very versatile, and the white color lets me spot it easily in my camera bag. A great backup/extra battery for my X-T5, which really goes through a lot of power when I'm out shooting.

I've had a number of K&F batteries and filters and have been consistently happy with them. I don't know how much charge the battery had when I received it, but it took about four hours to top off the charge. USB-C cord connects directly to the battery; no battery charger is needed, making travel with the battery much easier. Charing is noted by a red LED that turns green when charged; it does not indicate the amount of charge in the battery. I've only used the battery a couple days, but it seems to hold a charge as well as the Fuji batteries.

So far this has been a very good third party battery for my GFX 100s. The camera tested it as "New" when I charged it and first put it in, and it gave me reasonably close to what I get from Fuji's OEM battery. I typically buy another brand of batteries, have for years, and at least as a new battery, feel that this K&F is closer to the capacity of the OEM. But—I've only used it through two recharge cycles so far; so I can't comment on ultimate life or how the capacity will decline with age.

So—the new features, to me, at least: A snap on bottom cover! After I got this, I searched Amazon to see if anyone was selling just these covers to fit onto the NP-W235 batteries, I'd love to buy them for all my batteries. The other main feature is that there's no charging station—the battery includes a built in circuit to do this, and they include a cable (USB C!) (another nice surprise) that goes from any USB charging station directly into the battery. Now—this is either a positive or negative feature. You can also charge the battery in a regular charger.

It shouldn't matter, but I also like the look of a white battery. I think every digital camera I've had for the past 30 years has had black batteries, so it's just nice to see something different. The included cable is heavier duty than the usual "tossed in" charger cable. My sense is, after three K&F product purchases, that K&S is trying a hit a more select market niche, with the goal of becoming a well known, and respected brand.

I had this camera in a drawer because I sell them used seldom use it because after a couple of years the battery was short-lived so I bought a new one and put it in a drawer. Putting this battery and was an easy fix and brought it back to life. I use this when doing water or lake shots is my Fuji is capable but much less expensive than my Nikon. Battery works as it should and charges rapidly with no problems.

The battery arrived on time. I positively evaluated the possibility of charging without the dedicated charger but directly from USB (very convenient). I immediately charged it and tried it, my Fuji recognized it immediately and the status indicates "New". I would say that for the moment I am very satisfied, I will have to wait a little while to see how it behaves under stress (intensive use, cold temperatures) to get a more accurate idea.

Used in my FUJIFILM XT-5 without problem recharged a few times and still OK.
Practical on the move without bringing the charger.