This is a set of two and works perfectly in my A9. I have a battery grip and this is my backup. I didn't have any extra batteries and these two are doing the job. I'm very excited.

More capacity, USB-C charging and NO warnings! A winning trifecta in my opinion. Other brands make claims but K&F has it down. On top of that, they don't break the bank either. Glad I found these because I will definitely be getting a few more. Works perfectly in my a6700

love this battery option. I don't know if I'm ready to switch to these batteries exclusively for long, important trips, but I'm hoping it will help me avoid carrying yet another charging brick. This battery works perfectly in my Sony A7R4a; I haven't received any warnings about unsupported batteries like I have with other non-Sony batteries. It charges slowly, but not so slowly that it's a problem. It seems to last just as long as my Sony batteries, but I haven't specifically tested that. If I get consistent performance from this first battery, I'll definitely switch all my OEMs to this battery with the built-in charging option. A pleasant surprise was the "case" that comes with the battery. It comes with a small plastic cover that protects the important part of the battery, but doesn't add much size or weight to the battery. It's the perfect option for a traveler who wants to save every gram (and therefore leave the charging brick behind). This yellow cover even fits on my OEM batteries. I would buy a pack of five of these separately if that was a cheap option.

Compatible with recent firmware updates from Sony. The battery itself is white, which makes it different from other batteries. It comes with a USB-C to USB-A charging cable, as this one can be charged via USB, unlike Sony's own batteries. This is a huge advantage if you don't bring the charger with you. You may want to buy several of these batteries so you can charge one, have another ready, and use another. This would give you the option to switch batteries throughout the day. While there is no charging indicator on the battery, there is a battery light that glows red while charging and turns green when charging, so you can be sure the battery is fully charged. When placed in the camera, it will show as 100%. Many newer FZ100 compatible third-party batteries give a warning and don't register the battery percentage with Sony's latest firmware updates, but this battery works great. I tested it with my Sony FX3 firmware version 4 and it worked similarly to a genuine Sony battery. There is no compatibility warning message. The battery went from 100% to empty. It ran for 1 hour and 35 minutes until it ran out and ran in that state for another 15 minutes to 1 hour and 50 minutes, giving you plenty of time for a battery change. Full compatibility with the latest firmware, USB charging and good runtime make these devices a great bargain.

I love these USB-C rechargeable camera batteries. It has the same capacity as an OEM Sony camera battery at a fraction of the cost and has a USB-C port for fast charging on the go without the need for a special charger!

as good or better than OEM considering how versatile they are - the fact that you can connect USB C directly to the battery is a deciding factor. especially since they offer the same battery capacity as standard batteries. I can't recommend these enough.

It's a good battery and seems to charge in a similar amount of time to the original battery. I had no problems using it and found that it gave me very similar performance to the genuine article. Just having a USB-C charging port is a fantastic idea – who doesn't have a USB-C port these days? More than happy to recommend this product.

What a nice little upgrade for your camera's battery arsenal. They fit perfectly and work perfectly in my Sony camera. No error messages. Best of all, it's USB C rechargeable. Everyone has a USB C cable these days, so charging is a breeze if you don't want to charge from the camera body. Battery life is excellent. Comes with a USB C cable for charging if you don't already have one, but you do lol.

The K&F Concept 2600mAh NP-FZ100 battery is a great choice when I work in places without many power outlets. It works with many Sony cameras, like my FX30. A big advantage of this battery is that it can charge quickly using a USB-C cable, taking only around 2 hours for a full charge. This is very useful when shooting in remote locations where you can't waste time and have limited access to electricity. Plus, you don't need a separate charging station, which makes packing and transporting your gear much simpler, and I have less to carry.

The build quality is excellent. It works exactly like the original Sony battery and I haven't noticed any difference in charging. The main reason I bought this battery was the USB-C fast charging, which is excellent. I can quickly charge my car battery. Excellent value for money.