The K&F CONCEPT NP-FZ100 camera battery charger was delivered quickly.
It is packaged neatly and appears to be of high quality.
However, the item description on the product page is a bit muddled and confusing. You have to look carefully at which battery you really need.

But the batteries are no worse than the originals from Sony.
They load quickly and reliably.
Of course, not much can be said about the longevity, but so far I'm really satisfied.

I was looking for replacement batteries for my Sony camera and decided on this set from K&F Concept, which arrived well protected in a small box. At first glance I was quite satisfied, because the charger is not too big and has 2 inputs. Once USB-C, which was the current standard, and a micro-USB. A charging cable is also included, but unfortunately only micro USB.

The battery capacity with 2280mAh and 7.4V voltage is good. Offers power and runtime like the originals. In the charger, charging is indicated by a red LED and when full, it lights up green. I was also able to charge original batteries with it, which is very practical. In addition, the charger can be used to charge the device on the go, also via a power bank.

The processing is okay and the quality filled me too. All in all a good extension, because you can never have enough batteries. Because of the good price-performance ratio, I can recommend this set.

Thank you for taking the time to read my review. I hope that I was able to help a little with this, also with the photos.

Just as good as OEM batteries.

As we all know, third party camera batteries can be a bit controversial as some batteries are enlarged or just fail. OEM batteries are more known for being very reliable and punctual. However, this comes at a much higher cost.

I would say these do the job and only time will tell how good they are for long term use. So far I find them excellent. This is convenient as they can be charged from a wall charger, car charger or external power bank.

I can only recommend these batteries.

The batteries work like the OEM batteries in the H2s and X-T4. They can be charged in the cameras, which is great. The charger has a USB-C connector. The combination of these two features guarantees that you can charge these batteries wherever you can charge your phone. Great for travel. From a usability point of view, I don't feel the differences between these and the OEM devices. They work great in my Fuji cameras.

High quality - compact - expensive - modern - 2250mAh - nice design - Sony battery charger set

The K&F Concept battery charger set for Sony comes in a medium-sized plastic box and is well packed. The delivery includes a charger, two batteries, a micro USB charging cable and no instructions. The battery charging set is very high quality and well made. Each battery has a storage capacity of 2250mAh. It takes 4.5 hours to fully charge the 2 batteries. If the battery is empty, it can be charged via the charger with the supplied micro USB charging cable. Unfortunately, no power supply was given here. Optionally, you can also connect to the computer or laptop for charging. It also has a USB-C input, with which you can also use USB-C charging cables. I'm happy with it.

Scope of delivery:
➡️1x charger
➡️2x batteries
➡️1x Micro USB charging cable

Pro:

K&F Concept should be familiar to most people by now, they have steadily expanded their portfolio of products and even if I wasn't aware of it, there are also replacement batteries in the range.

The NP-FZ100 set tested here comes with a USB charging cradle and can charge two batteries at the same time. Of course, it also charges the original battery
Where K&F found the outdated micro-USB connections and cables is a mystery to me.

The batteries are almost identical to the original and have 2280mAh. They feel a little shorter than the original, but this could even out after a few charging cycles.

Except for the somewhat long loading time, a really good replacement set and a recommendable alternative to the original from Sony, which is twice as expensive

The two "NP-FW50" batteries that are 3/4 charged also fit in a Sony A-6400 camera and work reliably without any problems. An enclosed micro-USB cable is firmly plugged into the small charger, another USB-C connection without the supplied cable can also be used.

Especially in cold temperatures or when travelling, you are on the safe side with additional batteries that you can take with you on the go, and I think that both batteries are also safe and last a long time. There were no instructions included, but there is a "CE" mark on the batteries, the charger and the packaging.

K&F supplies a complete set for Canon.

In my case for the EOS R.

Compact and comprehensive, the set comes in solid packaging.

The battery, charger and cable make a high-quality impression.

Charging time is close to the original, you need a little longer, but it is due to the capacity.

The batteries are recognized without any problems and the camera works as it should.

Can recommend this set.

⭐⭐⭐⭐
This set of two NP-FZ100 battery packs and a dual charger comes with a Micro-USB-USB-A cable.
The charger is made of plastic and is well made and does not look high quality. It has two built-in LEDs, which light up green and red and provide very superficial information about the charging status.
On one side are a micro-USB and a USB-C port.
Charging is self-explanatory by connecting the included cable or your own USB-C cable and then plugging it into a USB power supply or power bank. Then the two batteries in and it charges.
The batteries are well made and work better than the charger. They fit easily into a Sony camera and are similar in performance to the dozens of other third-party batteries.
Compared to Sony batteries, they are not as good, but they are also significantly cheaper.
With the charger you can charge them reliably, but slowly. With an original from Sony it is synonymous.
And overall it's a good set, even if the charger isn't great. Reasonably priced and recommended!
⭐⭐⭐⭐

My main camera is a Canon 5dmkiv and I'm a big fan of backup batteries (the camera is battery hungry!) but the OEMs are extremely expensive. My current three Canon batteries are aging, I needed something new for my camera.

I have several Edelkrone motion control products that are also battery hungry and are powered by the LP-E6NH. I order third party batteries for the Edelkrone gear and that was my original intention of trying them out.

These are closer to Canon's surface than any other third party. They charge well with the included charger or Canon's. (And the included charger does a great job with the OEMs, too.)

My 5div recognized these batteries and displayed them at 100% charge and three bars of charge power (max), allows me to register them - gives the same information I get from the OEM. After checking that, I decided to actually use them to take pictures. For the first time I felt safe doing that with this camera.

I'm having a hard time doing a scientific comparison of battery life. I've used each of the K&F batteries in the camera until they were pretty depleted and they seemed to last about the same as my Canon's, maybe a little longer as those age.

So basically these are high quality alternatives to OEM products at a more attractive price point while still offering excellent performance. I would definitely order more.