These batteries appear to work as well as the oem one's. I have had no issues with them.
07/03/2024
These are proving really useful as spare batteries for my Sony A7s. NP-FW50s are notoriously weak batteries that drain in no time, and these are pretty similar to the Sony originals, but I like the advantage of being able to charge them by USB-C. Saves me dragging another set of chargers around with me.
Though I'm really pleased with them, they really missed the boat with the USB-C port placement. If they'd put that on the bottom of the battery as it's installed in the camera, they could be charged on the go, or act a kind of dummy battery to pull in a source from something like a v-lock battery. But that's nitpicking. Good value and effective.
Though I'm really pleased with them, they really missed the boat with the USB-C port placement. If they'd put that on the bottom of the battery as it's installed in the camera, they could be charged on the go, or act a kind of dummy battery to pull in a source from something like a v-lock battery. But that's nitpicking. Good value and effective.
30/01/2024
The thing I like the most about this battery is that I can recharge it in my car with just a USB cable; no need to take along a battery charger. It's a small thing, but I have enough trouble remembering the equipment I need for a photo safari. One less thing is helpful.
It also works well in my Fuji GFX 100S. Just like the original equipment. I can't say if it takes the same number of shots as the original, but it's close enough for me.
It arrived with a charging cable to boot. Overall, I'm pleased.
It also works well in my Fuji GFX 100S. Just like the original equipment. I can't say if it takes the same number of shots as the original, but it's close enough for me.
It arrived with a charging cable to boot. Overall, I'm pleased.
26/01/2024
Was able to charge battery with USB C port, with camera body and with external charger. Battery life seems about the same as original battery. Highly recommended!
22/01/2024
We are using this with our GFX 50 SII alongside two Fuji brand batteries. So far, they appear to perform the same, with one significant difference: the K&F Concept can be charged with a common charging cable. It has Type C Fast Charging, making it very convenient, especially when in the field. This is a brilliant feature. We wish all camera manufacturers would adopt this ability.
13/01/2024
This battery is just as good as the OEM battery for photography. I can just about as many shots out of this battery on my X-H2 as i do with the OEM battery minus a handful. There is a slightly noticeable difference when running video on this battery as it gave about 20 mins less record time than the OEM. This wasn’t a scientific study and other factors may have played into the shorter runtime such as camera temp.
The white color of the battery is a nice touch to the traditional boring black batteries. This color makes your K&F battery stand out amongst the rest. The usb-c port allows for you to charge on the go without the need of a charging station.
The white color of the battery is a nice touch to the traditional boring black batteries. This color makes your K&F battery stand out amongst the rest. The usb-c port allows for you to charge on the go without the need of a charging station.
28/12/2023
I ordered this 2 pack of the K&F Concept 2400mAh NP-W235 Battery for my Fuji GFX100s.
When I take my GFX out for a full day of shooting, I have to take a boatload of extra batteries with me. The energy-hungry GFX uses the same low-capacity battery as the newer Fuji X-series cameras. I'm sure that the Fuji engineers chose to use this smaller battery (as compared to the battery found in the GFX50r) in order to reduce the size and weight of the 100s, but any advantage gained is, in my opinion, more than compensated for by the need to carry more batteries and a charger to charge them on.
These batteries don't need a charger. You just use the included USB-C to USB-A cord. The USB-C end plugs right into the battery and the USB-A end goes to your favorite charging block or your car's USB port. Honestly, it's a technology that deserves to be adopted by all of the camera manufacturers unless they want their clocks cleaned by the quality third-party battery distributors.
It's hard to directly compare the longevity of any battery with another, because every shoot is different. A shoot where I am using the LCD screen a lot is going to eat up battery power faster than when I rely only on the viewfinder. What I can say is that these batteries play nicely with the Fuji electronics. The camera throws no errors when using the K&F Concept batteries and properly reports their state of charge and capacity.
When I take my GFX out for a full day of shooting, I have to take a boatload of extra batteries with me. The energy-hungry GFX uses the same low-capacity battery as the newer Fuji X-series cameras. I'm sure that the Fuji engineers chose to use this smaller battery (as compared to the battery found in the GFX50r) in order to reduce the size and weight of the 100s, but any advantage gained is, in my opinion, more than compensated for by the need to carry more batteries and a charger to charge them on.
These batteries don't need a charger. You just use the included USB-C to USB-A cord. The USB-C end plugs right into the battery and the USB-A end goes to your favorite charging block or your car's USB port. Honestly, it's a technology that deserves to be adopted by all of the camera manufacturers unless they want their clocks cleaned by the quality third-party battery distributors.
It's hard to directly compare the longevity of any battery with another, because every shoot is different. A shoot where I am using the LCD screen a lot is going to eat up battery power faster than when I rely only on the viewfinder. What I can say is that these batteries play nicely with the Fuji electronics. The camera throws no errors when using the K&F Concept batteries and properly reports their state of charge and capacity.
26/12/2023
It's supposedly larger capacity than the OEM battery, but it seems debatable that it actually lasts longer in the field. The beauty is that it recharges with just a USB-C cable, but it can also be recharged in a standalone charger or in the camera. Very versatile, and the white color lets me spot it easily in my camera bag. A great backup/extra battery for my X-T5, which really goes through a lot of power when I'm out shooting.
23/12/2023