A good value third party charger. Small and neat, decent build quality. Charging time good, does exactly what its meant to do.

These 3rd party batteries are almost like the original that came with my X-T5. Out of the box, they were already 75% charge. Nice.

Physically, they are identical except for one thing, as far as I can tell. The ends of these batteries are not completely flat. If you place one on its end, you can rock it back and forth. About a third of the ends has a slight bevel. Nonetheless, these batteries go in and out of the camera without any issues. Another oddity is that the orange covers can only snap into place in one orientation. And the reason I find this odd is because the covers have a battery shape cutout that you can use to identify whether the battery is charged or not by the orientation the cover is attached. These covers don’t fit the original Fuji battery, because its ends aren’t beveled.

Weight wise, original=80g, these=78g. Close enough.

Electrically, these batteries seem to perform the same as the original, despite the 0.2V higher output voltage and 0.2Wh higher capacity specs. They don’t generate more heat nor have any side effects, as far as I can tell. The X-T5 was even able to read the age of these batteries (yes, as new.)

Unscientific methods show that the discharge and charge times between these and the original are roughly the same. Using the included cradle and the 5V,3A AC adapter that came with my X-T5, charging a single battery from near 0% to 100% took about roughly 4 hours. The cradle regulates the power output to 8.4V, 700mA for one battery and 8.4V, 500mA for two batteries. K&F specs an AC adapter capable of at least 5V, 2.1A , and using a more powerful adapter probably isn’t going to help with charge times.

Each of these batteries (at the time of this review) is about 1/3 the price of the Fuji’s, which given how they perform, is a great deal. I can’t tell yet how they perform in the long term, but given the price, I don’t think I can complain regardless.

This is a very handy, compact battery set for Fuji cameras. I personally have a Fuji X-T4, and that is the camera I tested these batteries with.
The negative aspects of the unit: The unit doesn’t come with a power plug—it only comes with a USB-A to USB-C cord, which would allow you to plug the unit into some other USB power device that then plugs into the wall. The only other thing is that the LED display of the charger is on the bright side, and might need to be covered up with another item or some light dimming stickers, especially if you’re traveling with this charger in a small hotel room.
This unit is very compact in size and would be very easy to travel with. The base of the charger is only slighter in surface area than if you were to lay the two batteries flat on a table next to one another. The batteries plug into the unit vertically, though, as the “butt” end of the battery makes a connection with the charging prongs of the charger. Also, the mobile charger appears to have two power inputs: A USB-C one (which would work natively with the USB-C cable included with the unit) AND a micro USB connector! This flexibility is ultra handy if you have extra micro-USB cables lying around and you need to poach that valuable USB-C cable for some other device you’re traveling with. (Note: I have not tested charging batteries in the unit with the micro-USB interface. If I do and I have issues with it, I will come back and update this review.). Also, there are animated LEDs that describe the status of charging each battery, independently of one another. This feedback is nice to be able to see how close you are to a full charge.
The batteries that come with this unit feel pretty solid and comparable to Fuji stock batteries. Comparing the battery to the Fuji battery that came with my XT-4, the only notable difference I see on the label of the battery is that the voltage and Watt hours of the batteries are slightly different. (The authentic battery that came with my camera reports 7.2 V, 2200 mAh, and 16 Wh. The sticker on these batteries indicate that the batteries output are 7.4 V, 2200 mAh, and 16 .2 Wh. This would mean that the batteries that come with this charger are nominally higher voltage, though this doesn’t seem to make a difference to my camera.) Like the authentic Fuji batteries, the (2) batteries that come in this package are also Lithium Ion. I have tested these batteries in my camera and so far, they appear to operate identically to the stock Fuji battery of my camera.
Overall, I’m very satisfied with this product, and would recommend it to anyone who has an X-T4 or any other type of Fuji camera that uses these batteries.

So far works as expected as the original Fujifilm NP-W235 batteries. No warning in the camera indicator, no heat-up, and they last as long as the original ones.
The charger is also beneficial since no external charger is included in the camera kit. It provides much convenience when traveling and you need to charge more than one battery at the same time.

Product review: K&F CONCEPT NP-FZ100 camera battery charger with USB dual slot, 2-pack 2080mAh replacement battery set, compatible for Sony A9 A7III A7RIII A7RIV, Alpha 9S, A9S, Sony A7R3, Sony A7R4 digital cameras Dimensions: 16.7 x 10.9 x 2.9 cm Weight: 0.27 kilograms Two batteries can be charged at the same time, and the charger can only charge one battery. The charger can be operated via a micro USB cable as well as via USB C and can therefore be connected to a cell phone or laptop as well as to a car charger or even a power bank. The included batteries are characterized by the fact that they are easily recognized by the original charger, which means that they support the original charger chipset. Deficiencies: In fact, the actual value that the camera reads is not the actual charge percentage of the battery. This means that the battery is fully charged via the included charger, then the green light appears. After that, insert it into the camera and you will get a charge percentage of about 85%. If you use the original charger, the battery will be recognized, and after charging, fully charge the battery and install it in the camera. We note that the camera reads the battery charge percentage of 93%. However, if we compare the quality with the price, we see that this defect is not significant. I give this product 4 stars from my point of view Thank you for reading my review, I hope it was helpful to you.

As we all know, you can never have enough batteries, so I ordered the set from K&F CONCEPT. It comes with a dual charger and 2 NP-FZ100 batteries. The charger can be operated with a USB-C or micro-USB cable. However, only a micro-USB cable is included in the delivery. Why the manufacturer doesn't include a more modern USB-C cable instead of the micro-USB cable remains a mystery to me. Two batteries can be charged at the same time. However, the charging current is split between both batteries and the charging process takes longer than with one battery. Otherwise, the charger is very spartan. You won't find an informative LCD display for the charge level here. There is only one LED per charging slot, which lights up either green or red. There are many much more convenient chargers in the same price segment. The batteries, on the other hand, make a better impression than the charger and are on a par with the best third-party batteries in terms of capacity. The batteries are also accepted by my Sony cameras without any problems and without any error messages. The camera's battery life is quite similar to that of the original Sony batteries. Overall, the K&F CONCEPT set is worth recommending, even if I don't think the charger is very good. However, the batteries have a good capacity. I give the set a solid 4 stars.

I waited a bit before writing this review to see if there would be any issues that crop up. Fortunately, the charger works perfectly (charges OEM Sony batteries also). The fact you can connect it to a power bank is a massive bonus for me especially when out in the woods with no AC outlet options.

It does what it do

Works well

The charger and batteries that replace the Sony NP-FZ100 are great, and cost half as much. They fit my camera like an OEM battery and work really well. I can't imagine paying full price for a Sony battery. There's no noticeable difference.