K&F Concept 2600mAh NP-FZ100 Battery and Charger Set, Compatible with A7iii Battery A7 III, A7iv, FX3, FX30, A6600, A7C, A6700, A7RIV, A7Siii, ZV-E1, ZV-E10ii, Alpha 9 II, A9S Cameras

This battery and charger kit is a solid choice for anyone with a compatible camera. I bought it for my A7iii, and I'm really impressed. Not only do they work just as well as the OEM batteries that came with the camera, but they also fit perfectly in the camera body, so you don't have to worry about a drop in performance or a loose connection.

​The batteries themselves have a 2600mAh high capacity, which gives you plenty of shooting time. The best part is the dual-slot charger, which lets you power up both batteries at the same time. The whole setup is small enough to fit right in my small camera case, which is a huge plus for traveling. The LCD screen is also super handy because you can see exactly how much charge each battery has in real-time. I even noticed that the charger works just as well with my original OEM batteries, charging them at the same rate as the new ones.

​Speaking of charging, I noticed that the charging speed really depends on the power adapter you use. I have a fast-charging USB-C adapter for my laptop, and it charged both batteries to full in no time. Another thing I really like is how you can charge the batteries with a regular Type-C or Micro-USB cable. That means I can use my phone charger, a car charger, or even a power bank to charge my camera batteries on the go, which is a huge plus.

​Overall, this kit is definitely worth the money. Considering that a single OEM battery costs almost as much as this entire package, it's a no-brainer. If you need extra batteries for your camera, this kit is the way to go. It's fully compatible with a ton of models and gets the job done without any fuss.

These are very nice, and higher capacity than the OEM batteries which is always nice. I have several K&F items in my bag, so I feel comfortable using batteries from them.
I got them all charged up, and the display on the charger is really nice, showing an indication of the charge. I had a shoot today and wanted to give them a test run. I shot for about an hour and a total of just under 500 photographs. Starting at 100% and ending at 72%.
One thing to note, I did not get the battery warning saying it might not function properly one either my a7rv or my fx30. I'm sure that will change with the next firmware update though.
Overall super happy with these batteries.

The K&F Concept NP-FZ100 2600mAh Battery and Charger Set is a must have for anyone with a Sony camera that uses the NP-FZ100 Battery. I recently got the A6700 and was disappoint to find out that it didn't come with a battery charger and you could only charge it while it was in the camera. So I went looking for NP-FZ100 battery charger and for less than the price of an OEM battery, I found this K&F battery and charger set. I'm very please to say that is exactly what I wanted along with 2x extra batteries and a charging dock. This dock also can charge the battery that came with the camera. So if you shoot with Sony Cameras, I highly recommend picking up this battery and charger set.

This is a good battery kit to keep as a spare for your Sony camera. Batteries charge up and work well in the camera. Battery life is on par with original batteries (so far). Nice compact charger. A nice set here.

I bought this set just for the batteries. I have other external chargers already.

While I can't say that these batteries last longer than the OEM ones (which in theory have a lower capacity), they do work well in my A7RV and A7iii. And, importantly, that warning message does not come up... and the percentage of power remaining consistently shows up. Of course, these could change when Sony updates the firmware. I also like that the batteries include shields to prevent accidental discharge.

Great product at a great price.

The batteries work in an A7RV without the usual "must press Confirm to use" warning from the camera when it detects a non-Sony battery. Two batteries plugged into a USB-C port in a multiport 200W charger went from 2 bars (assumed to mean 50%) to 4 bars (100%) in about 4 hours. So it's not as speedy cycle time as a more powerful charger would provide but is good enough. Haven't tested the extra capacity/amperage they afford.

The K&F CONCEPT 2600mAh NP-FZ100 Battery and Charger Set is an excellent companion for Sony cameras. The battery holds a strong charge and lasts a long time, making it perfect for extended shooting sessions without worrying about running out of power. It’s fully compatible and functions perfectly with a wide range of models including the A7III, A7IV, FX3, and my A7RIII, giving great versatility. The charger is fast, easy to use, and compact enough to carry in a camera bag. The batteries feel sturdy and well-built, and installation is effortless. Overall, this set is a high-quality, dependable, and great-value solution for anyone needing extra power for their Sony camera.

Update: On my new A7V, the battery warning does appear.

Original:K&F Concept has earned a reputation for making high-quality, affordably priced camera accessories. This charger and battery package is another example.

Let's start with the charger. The USB-C charger is fairly simple, but effective. It doesn't include a power adapter, but I have so many already that I'm relieved not to have bought yet another one. It can charge two batteries simultaneously. Each battery has a bright and easy-to-read charge level indicator.

The batteries seem fine in terms of capacity. What distinguishes these from many other non-Sony batteries is that they don't trigger that annoying warning from the camera which can be pretty frustrating when it interrupts you at the most inconvenient moment.

The manufacturer states that the charger and batteries have a wide array of protective features including "Overcharge / Overheat / Overcurrent / Overvoltage / Short-circuit protection". Don't overlook the importance of these. I wish I had a way to test these features, but since I do not, at least I feel that I can trust K&F Concept's claims.

I’ve been using these batteries with my Sony A7iii and they’ve been working perfectly. They actually have a tiny bit more capacity than the ones that came with my camera, and I really can’t tell the difference in performance. They last just as long, hold a charge well, and my camera reads them without any issues.

The charger is pretty standard, but what I really like is that it uses USB-C instead of micro USB. I already carry USB-C cables for everything else, so it’s nice not having to bring along a separate cord just for charging batteries. It’s one of those little things that makes a difference when you’re trying to travel light.

Overall, I think this set is a great deal. The batteries work exactly as expected, the charger is convenient, and it all feels reliable. For the price, it’s hard to argue with the value, and I’d definitely recommend it to anyone who needs extra batteries on hand.

This battery and charger combo has been a fantastic addition to my photography gear. I was constantly worried about my camera dying mid-shoot, but with this set, I can finally relax. Charging two batteries at once is super convenient, and the LCD screen lets me know exactly what's going on. Plus, the batteries themselves seem to last a really long time, much better than my old ones. I feel much more confident heading out for long days of shooting now.