Taken to change other batteries that with the new updates for the a7iv and fx 30 are no longer compatible. These are perfect, no messages on the machines and no problems, similar duration to the originals.

Great value and completely compatible

Kit comes with 3 batteries, a 3 battery charger, USB-C to USB-A charging cable. The charger itself also has a micro USB charging port but I see that as an odd and rare addition if you happen to have a micro USB charging cable.

These are 3 standard NP-FZ100 batteries and 3 battery charger. Most kits are 2 if not singles so this already is a great value for the price. They work with many recent Sony Alpha series cameras.

Most important is compatibility as recent Sony camera firmware updates broke compatibility with third-party batteries. Typical the camera would throw a warning and no battery percentage would be reported. I tested with my recently firmware-updated Sony FX3 and confirmed compatibility and the camera sees it functionally as it would any Sony battery. Given the cost of Sony batteries, this makes this K&F kit of great value. These batteries can keep you shooting for the better part of the day compared to a single Sony battery. This is an exceptional find.

My FX30 can go through batteries, so this set will work out great. The set will provide hours of power while the charger is nice and compact. K&F Concept is also a brand I trust more than others, so I know these batteries should last and perform well for a long time. If you have a Sony camera that uses these batteries, I would put this set at the top of your list.

Batteries charge up all at the same time and fast. Nice viewable screen. Its great!

Cannot go wrong here, not at this price.

I never go in the field without multiple batteries, just in case Murphy shows up...unannounced.

With this one piece of kit, you get three batteries and a charger that can charge them all at the same time.
It's not a fast charger, but you have multiple batteries, you shouldn't under the gun time wise.
Plus it will charge any other compatible battery if you need to.

Well, they are 3 batteries that are completely compatible with the latest Sony camera models and work practically the same as the originals. I haven't done very exact measurements yet, but maybe they last a little less than the originals, which are cheaper for a reason and the originals are so expensive, but what can I say? For me, they work very well and unless you need to have the camera on and working for many hours in a row, if they lose about 15 minutes of duration, they are perfectly fine for me.
Also, their charger to charge all 3 at the same time is the best, not like the original, which has to be charged one at a time.
It doesn't have a charging base for the socket, but you can plug it into any socket that has a bit of power so it goes pretty fast.

K&F CONCEPT launches this KIT of NP-FZ100 batteries plus the charger that is delivered to us in a box together with a USB cable.

Once we take it out we see a charger with the capacity to charge up to three units of NP-FZ100 batteries, which are the ones that are included.

This battery model, NP-FZ100, is the most compatible in the cameras that Sony has launched lately for some time, so they are the most versatile as they can be used in different camera bodies.

They have a capacity of 2280mAh which is the same as the original Sony ones, although it is true that these from K&F CONCEPT, even when charged to 100%, last a little less.

When you put them in the camera, it recognizes them perfectly and does not pop up any warning that the correct operation is not guaranteed if you use them and if you want to continue or not. And not only that, it also marks on the screen the capacity in % that they have, something that with another brand that I have, at least the one I bought, it didn't show me and I got the warning, in these K&F CONCEPT ones it's the same as if you put an original one in.

In the charger you can put 1, 2 or 3 batteries to charge at the same time, the charge is done independently for each one of them, the only thing that happens is that the charging time, if it will depend on the units that you put to charge since the charger is limited to 2Amp and this energy has to be distributed between the units that you put in. If you put in just one it will take about 2 hours and if you put in all three it will take about 5 hours or so (approximate times).

The charger is delivered with a USB-A to C cable, a Power Supply (charger) is not included, you have to put that one in, but any one you have at home with a 5v and 3Amp output will do so as not to force it since the K&F CONCEPT charger at full charge consumes 2Amp as I mentioned above. Yes, a 5v 2Amp power supply is fine, but it would be forced (to the limit) and in electronics you have to leave some margins and it is better to have a looser one.

You will know the charge status of the batteries at all times thanks to a small LCD display with three battery symbols that indicate the charge with moving lines and that will remain fixed once the battery has charged.

The charger can be powered in two ways or ports, USB-C and Micro-USB, you can use either one but not both at the same time. This is good in case one day you forget or damage the cable and you have to pull out an old cable to get out of trouble, you can also use a USB-C to USB-C cable instead of the one provided, a combination that I see as more logical for the current times.

The batteries, as you can see, are exactly the same as those of the Japanese brand, only the labeling changes and it goes without saying that you can charge the Sony battery without any fear in any of the slots of this K&F CONCEPT charger.

Anyway, I think that K&F CONCEPT has released a good NP-FZ100 battery KIT with charger at a great price and if you have a Sony camera body, it is a good option that you should not miss.

I hope this review has been useful to you

I decided to try these K&F batteries looking for a cheaper option than the official Sony ones and the truth is that they have pleasantly surprised me. The first thing that stands out is that they are fully compatible with my camera.

There have been no error messages or anything strange, they work just like the originals. The duration is also up to par, I have been able to use them for long sessions without problems and the performance is just as good. The charger, despite being an accessory, seems to me to be a success. It allows you to charge the three batteries at the same time and shows the charge level of each one. The build quality of the batteries and the charger is solid, you can tell they are well made. Honestly, for the price they have, I think it is a highly recommended purchase for anyone who needs additional batteries for their Sony camera.

The battery charger is pretty standard, what makes it stand out are its 3 charging slots, which is very handy. I do outdoor recording and use a lot of batteries so this is great for me.

It comes with everything you need to use it. I highly recommend this brand, especially for the price.

Good quality NP-FZ100 batteries and Charger from K&F Concept.

I have been using the batteries and charger for twelve weeks and so far I have had no issues.

If you are out and about using your camera having extra batteries is a must have accessory to ensure you can keep taking photos for as long as you need/want to.

The charger is nothing fancy and nor does it need to be as long as it can charge the batteries which this does very well, I like the fact that you can connect this to power bank and charge the batteries making this truly portable should you need to.

The batteries do not last as long as original Sony batteries BUT then again alternative batteries never do last as long as original ones, but they are cheaper you are getting three batteries and a charger at just a little more money than one original Sony battery. So it will comes down to what is more important to you brand and better battery life time or price I will leave that for you to decide.

Overall I am happy with the batteries & charger.