Compared to the original battery, these have a slightly shorter running time, but this is compensated for by the option of being able to charge them directly from a power bank while on the go without a separate charger.
The price is also OK, so I recommend buying it
The price is also OK, so I recommend buying it
21/08/2025
I have several of these batteries. The only negative is that the camera manufacturer has programmed the camera to provide an initial warning, when the battery is switched on, after replacement. The manufacturer shouldn’t bother and just sell its branded battery at a fair price. Consumers get sick of price gouging and purchase accordingly.
16/08/2025
I was a bit skeptical at first, even though the promises are really bold.
I was not disappointed. The battery lasts twice as long as the original. The classic fear of an empty battery is finally unfounded
I was not disappointed. The battery lasts twice as long as the original. The classic fear of an empty battery is finally unfounded
10/08/2025
I am loving this battery! Apart from having spare batteries at hand to supplement the original one (that came with my Sony ZV-E10 which doesn't last too long), I love the ability to charge these outside the camera using USB C. I've charged it using a wall charger, a car charger and a power back in different scenarios - and it is a life (and time) saver!!
I also like the LED in each battery that is red while charging, and turns green when the battery is charged.
The battery fits my Sony camera perfectly, and the camera didn't show any warning about the battery not being original, etc.
I also like the LED in each battery that is red while charging, and turns green when the battery is charged.
The battery fits my Sony camera perfectly, and the camera didn't show any warning about the battery not being original, etc.
09/08/2025
Since FW50 batteries are so small, I didn’t expect to find a FW50 battery with USB-C charging capabilities.
Overall the battery is about a half-milliliter wider than the official Sony FW50 but it still fits inside the camera well. I tested with Sony ZV-E10 and the battery fit smoothly and performed flawlessly.
Due to its ever so slightly wider shape, I found this battery doesn't fit some third party battery chargers.
The USB-C charging is of course appreciated, as this means I can more easily charge batteries on the go and not have to worry about a separate battery charger.
Overall it’s another winner product from K&F concept.
Overall the battery is about a half-milliliter wider than the official Sony FW50 but it still fits inside the camera well. I tested with Sony ZV-E10 and the battery fit smoothly and performed flawlessly.
Due to its ever so slightly wider shape, I found this battery doesn't fit some third party battery chargers.
The USB-C charging is of course appreciated, as this means I can more easily charge batteries on the go and not have to worry about a separate battery charger.
Overall it’s another winner product from K&F concept.
06/08/2025
I have owned many batteries for my Sony A7 and this aftermarket battery with built in USB-C is a game changer. In the past I would have to just bring hands full of batteries with me. The next progression was a USB powered charger. Now with the built in USB port, that takes it to the next level. I almost always have a battery pack with me now between the phones, tablets, etc. that I carry. So now that the port is built in, I can literally take out a low batt and plug the USB cable into the batt and go.
Battery life so far is good, but longevity will be the ultimate indicator for whether this is a good value or not. For now everything works as it should so it gets 5 stars.
Battery life so far is good, but longevity will be the ultimate indicator for whether this is a good value or not. For now everything works as it should so it gets 5 stars.
03/08/2025
The battery keeps up well with the original batteries. Advantage: Cheaper, can be charged with a USB-C cable, protective cover on the contact side (for transport)
29/07/2025
It’s cool to be able to hook these up to a cable in a pinch. They last a few minutes longer than the stock battery.
28/07/2025
The problem with my zv e10 is that these batteries are so small you need to have a bunch on hand if you are out shooting video,that means having to carry around a charger as well. These are super convenient to be able to charge directly from any usb c charger cord like the one in my car all the time. This is a great invention!
26/07/2025