K&F CONCEPT 3-Pack NP-FZ100 Battery and Upgraded LCD Battery Charger Compatible with Sony A7iii, A7iv, A7C, FX3, FX30, A9, A6600, A6700, ZV-E1, ZV-E10ii, Alpha 9, A9S, A7R III, A7R IV, A7RV, 2280mAh

UPDATE: K&F reached out to me and asked for more info about the failure. I told them and sent a video showing the dead battery. They are sending me a replacement battery, even after a year! That’s great customer service I changed my rating to 5 stars based on the overall battery quality AND the amazing customer service! I’m very impressed.I'm writing this review a year after purchasing these batteries. They initially worked very well. No problems at all. They charged quickly and fit the camera perfectly. However, at a recent shoot, I put one of the charged batteries in the camera, and it was completely dead. I tried charging it when I got home, and it was still completely dead. The other two batteries are still working well. For the price, I'm still ahead compared to the OEM cost.

A few months of use and they are keeping charge great. Love the three battery charger so I can throw them all on at once.

Great purchase! I just got my Dad's Sony A7riii and didn't realize that the batteries were different than my a7rii until the night before I fly to Europe. Luckily I got overnight shipping and these batteries worked great! It did charge the Sony battery as well. It has an indicator for each of the three battery slots.Battery life seemed pretty good too, compared to the factory Sony battery. There was a USB connection to the charger so make sure you have a brick to connect to the wall outlet to the old USB 2.0 port. Great purchase!

If you're new to do the photography business, K and F Concept is a really reputable brand, so you don't need to fret about the quality! Speaking of the build quality, it is amazing. For the price you get a really decent battery charger kit. These guys have the same milliamp as the official Sony batteries, so you can rely on them for good batter life! I was pleasantly suprised by this product as I have tried third party batteries in the past that weren't so good.The build quality is nice, the value for money is nice, and they charge decently as a fast rate, but I did have a slight hiccup. When putting one of the batterys into the slot, I think I might have forced it in a little too hard as one of the pins bent. Now, I'm not sure happened but whatever it was I think it was most definitely my fault. Just letting you guys know, though!Overall, these batteries are really nice. They are ultra compact as well, so if you have a small camera bag these will definitely fit. 3 batteries are definitely enough to last you a full day of shooting, so say bye to those HUMOUNGOUS battery banks! Highly recommend :)

These work PERFECT with my sony zv-e1. My original sony battery that came with my camera actually gave out and is not working anymore but these have outlasted the OG battery which is crazy. Super easy to charge and worth every penny.

Fast at recharging the batteries overall does what describes comes with everything it needs.

These batteries work seamless in my new A7RV with the firmware updated to V 3.04. I felt the batteries didn't last as long as the Sony but might be how I use the camera.

Great Deal!