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

For use with the Sony A7R IV camera, I got the K&F Concept 3-pack of NP-FZ100 batteries and the 3-slot charger. These battery kits have proven very useful for me over the past few months, and I am very pleased with their performance and ease of use.

The batteries appear to have good longevity in terms of how long they can discharge before needing replacement and can fire at least several hundred shots per charge, which makes these on par with Sony branded NP-FZ100 batteries in terms of capacity. I particularly appreciate the utility of a simple LED indicator on the charger that informs on the charge status of each battery slot with green meaning fully charged and red meaning charging. The fact that it’s possible to charge 3 batteries at the same time is good because these cameras drain batteries rather quickly.

The physical construction of both the batteries and charger also appears to be well-engineered – there are no cheap plastic components here. The battery tabs, for example, are nicely click-in with the camera without any possibility to wiggle. But it is even better that the kit has a car charging adapter which can be used to charge batteries in my car whenever I do not have access to an electrical outlet.

Overal for the price offered, K&F Concept offers an exceptional value with this battery kit. It is very stable for my daily use of shooting pictures and the 3 slot charger is very useful. That means I never lack power to supply all my electrical appliances within my home. Definitely the best for those who own any sony mirrorless camera.

These batteries work as you would hope them to, just as good as the original manufactured batteries. That is good enough right there, but what sets this apart is the triple charger that displays the level of each battery as they charge. This has made charging so easy for me and I love it.

K&F used to be a budget brand that no one really knew about but now they have really upped their game! I own several of their products. From batteries to tripods and even their various filters. All of them I would consider premium products. The battery charger feels pretty generic like most of them out there. Smallrig, neewer, etc. What makes it different is the 3 charge slots which makes it convenient. I typically carry around 10 batteries with me to film weddings and having a charger that can do this amount of batteries at a time is great! One thing that ticked me off about Sony is they released newer firmware that actually removed the percentage on the batteries if they are not from Sony which left you guessing what percentage they were and you had to rely on only the battery indicator like old school cellphones. So even ones that I bought before that stated they were compatible and gave no errors, unfortunately now do. These batteries however do not give you the warning and retain the percentage for now at least before Sony decides they want to be greedy again. Highly recommend this brand. You won't regret it especially for the price.

Looks like K&F is branching out from just lens filters. Their batteries and charger are just rebrands, but that's not a bad thing.

Fast charging and a great bang for your buck of a kit. If you need food batteries and a way to charge them this is for you!

These batteries are incredible, at this point, most companies have nearly perfected the FZ100 battery, so there's almost no point in buying an authentic Sony battery, especially when some of these batteries hold a bigger charge too! These batteries last FOREVER, I could easily get away with shooting video and photos over an entire day with just 2. For the price and the included charger, this is amazing, if this goes on sale, you would be getting a steal!

To my great surprise, the batteries once mounted on my Sony A6700, did not return any warning on the camera. For the price of an original Sony, you get 3 with charger included. A bargain.

Having recently purchased a new Sony A7RV, I was looking for another battery. I came across these by K&F, and having had other products by K&F, thought I'd give them a try...especially as 3 of these these come in at almost exactly the same price as a single Sony battery.
Absolutely perfect! Despite being third party batteries, my camera (which has the latest firmware), didn't display any errors or warnings. Battery life and build quality is as good as that from Sony. I really like the triple charger as the charge for each individual battery is shown and you could potentially charge everything from a high capacity power bank if you're on the road away from mains power.
I haven't noticed any difference in shooting time - everything is absolutely on par with Sony - so I'll very happily recommend these to anyone who uses NP-FZ100 batteries.

I use these batteries in a Sony A7IV and a Sony FX3, professional photo and video cameras that require powerful and reliable batteries.

These batteries work perfectly for me, they behave like the originals, they are well made and have a duration of use similar or identical to the originals.

A great addition to this pack is the triple charger, which allows us to charge up to 3 batteries at a time. In addition, the charger shows the remaining charge for each battery, and once fully charged it turns off, thus avoiding overcharging. You can use a micro-USB or USB-C cable.

It is an excellent pack, at a very advantageous price (currently, €69.99)

HIGHLY RECOMMENDED.