It works perfectly in a Z6II. It doesn't give any errors like other batteries. It lasts very well, taking over 400 photos. Charging is very fast and can be done with a power bank. The ability to charge without a specific charger is very interesting. Good quality.

There are slight differences between Nikon battery with K&F battery. Operational wise the battery works on Nikon Z6III body, I can charge the battery using the Z6 III body or directly usb C charge on the battery. Capacity wise I don’t see difference of number of shots between Nikon and this battery.

It's been common advice to only go with OEM when it comes to batteries for cameras. I think that used to be true, but isn't anymore. Battery technology has come so incredibly far, and third-party manufacturers are the ones leading the charge. Nowadays, third party is better, cheaper, and include all the best features too.

In terms of build-quality, this thing is top notch. The plastic feels solid, with no flex whatsoever. It slides into my Nikon Z7 with zero issues, and powers my camera just fine. The 2600 mAh capacity is 14% higher than OEM's 2280mAh capacity. It's also $26 cheaper than OEM too, at the time of writing. Most importantly however, it has that all powerful USB-C port built in, so you don't have to use an annoying wall outlet or dock to charge it. It's just so much more convenient charging it this way, and I would honestly pay more for this feature... but they charge less. The only thing I can't attest to yet is its longevity, but I'll be sure to update my review if anything changes with that. As it stands, this is a must-have for photographers that need extra juice for their cameras.

It was working on Nikon ZF, Z8, Z7II and even on D800. Check my review https://www.youtube.com/watch?v=udZJ58BwIH0
I conducted an indoor photoshoot using the Nikon Z8, and the battery is now at 61%. During the session, I captured 1,373 shots with the 24-70mm f/2.8 S lens, consuming 39% of the battery.
24 hours camera off -1% of capacity.

In summary, while third-party Nikon batteries may seem like a cost-effective option, they come with notable downsides: rapid capacity loss over time, poor performance in cold weather, and the risk of becoming unusable after firmware updates. Original Nikon batteries, although more expensive, provide long-term reliability and compatibility.

That said, I tested a K&F Concept battery, and it works well with various Nikon cameras, including the Z8, Z9, and Zf. I’ll continue testing it in real-world scenarios and update you on its performance.

This rechargeable 2600mAh 7.2V Lithium camera battery is compatible with Nikon Z8, Z7II, Z 7, Z 6II, Z 6, Z5, D850, D810, D810A, D780, D750, D610, D500, D7500, D7200. It comes with a USB Type-C charging cable, and takes approximately 2.5 hours to fully charge. It can be charged with a powerbank, wall adapter, car charger, laptop, etc…During charging the light will be red, and turn green when charging is complete. This battery also has over. heating/voltage/discharge/current/short circuit/charging protection. This is an excellent replacement battery that is fully decoded.

Been using this battery on my D500 and I've been happy with it. Due to our current heatwave (40+ days of over 110 degrees) I haven't been able to do an extended shoot so I don't on now how it compares to the original battery (will update in about two months). I also like that the battery has a built in USB type c plug for charging on the go. My one concern is the price. The battery cost $40 which seems a bit steep. Yes it's a lot cheaper the the original battery, but there's also other reliable brands that sell this type of battery for about $15 less.

Overall it seems to be a good product but a tad pricey.

Perfectly compatible with Nikon D7500. Direct charging with the cable and a smartphone charger is a plus. However, the battery life seems a little lower than the original battery: to be confirmed. I am generally very satisfied with it considering its more affordable price than the Nikon battery.

this battery worked for my Z6iii, and no different from original one

It works in my Nikon Z with FW 2.01

K&F Concept has a great reputation in the photography and content creation industries as a company that provides quality accessories at a reasonable price. The K&F Concept 2600mAh EN-EL15C Battery, charged via a USB-C cable and compatible with the Nikon Z8, Z7, Z6, Z7ii, Z6ii, Z5, D850, D810, D810A, D780, D750, D610, D500, D7500, D7200 cameras, is an inexpensive and quality alternative to the more expensive Nikon batteries. Perhaps the biggest “selling” point of this battery is the fact that it can be charge via the included USB-C cable, meaning you can charge this battery via a charger, a computer or laptop, or even a car with a USB-C charging port. The battery has more capacity than the Nikon EN-El 15C battery (7.2V and 2600mAh, vs 7V, 2280mAh) so it should last longer for photos and video. It has various protections, including temperature, over-voltage, over-discharge, over-current, over-charger and short-circuit protection. Finally, it’s fully decoded for a number of Nikon DSLR and mirrorless cameras but not the Nikon Z f or Nikon Z6 III. Whenever you buy third party batteries, you should also keep in mind that Nikon, or any camera company, can always release new firmware for their cameras that might affect the compatibility with third-party batteries. But they remain a good value when compared to the original battery.