Each of the K&F Concept NP-F970 batteries weigh 291g (according to my scales) so are slightly more convenient to pack in my camera bag than their higher capacity counterparts.
With 6600 mA capacity, one of these batteries powered my high-brightness monitor continuously for almost 6 hours, without making it too cumbersome to setup & use.
Charging the batteries when exhausted is not a particularly quick experience with the provided charger, but is balanced by not heating the batteries during charging, so total life of the units should be very good, when compared to faster charging types.
I've got them to power a couple of LED wand lights, which should arrive soon, I'll update on their usefulness in a month or so.
With 6600 mA capacity, one of these batteries powered my high-brightness monitor continuously for almost 6 hours, without making it too cumbersome to setup & use.
Charging the batteries when exhausted is not a particularly quick experience with the provided charger, but is balanced by not heating the batteries during charging, so total life of the units should be very good, when compared to faster charging types.
I've got them to power a couple of LED wand lights, which should arrive soon, I'll update on their usefulness in a month or so.
10/09/2025
These batteries work perfectly in my camera. I've only ever used the OEM batteries that I got when I bought the camera. It's great to have 2 spares and another charger. I fully charged both batteries and have tested them both in my camera. The batteries work great and last a long time. The charger seems a little bit slow. Not the end of the world as these batteries are backups for the backpack and wont be used too often. Much cheaper than OEM so in my opinion, good value for money.
07/09/2025
These Sony NP-550 series compatible batteries which work well and produce consistent power over a sustained period of time.
The charging base holds two batteries and they are slotted in vertically which is a good space saving design. They are charged via a single USB C socket or a micro USB.
For the first charge I used a low power USB C charger and it took over 12 hours for the pair.
Then I used single batteries to separately power a Mark 1 Atomos HD Ninja and a V5 Atomos 4K Ninja.
The V1 ran for 24 hours the V5 about 6 hours. These are very different units with different power draws but the batteries worked well in both. I wouldn't hesitate to use these batteries professionally.
The charging base holds two batteries and they are slotted in vertically which is a good space saving design. They are charged via a single USB C socket or a micro USB.
For the first charge I used a low power USB C charger and it took over 12 hours for the pair.
Then I used single batteries to separately power a Mark 1 Atomos HD Ninja and a V5 Atomos 4K Ninja.
The V1 ran for 24 hours the V5 about 6 hours. These are very different units with different power draws but the batteries worked well in both. I wouldn't hesitate to use these batteries professionally.
02/09/2025
Great value for lots of mili-amperage of NPF for all your shooting/lighting needs.
The batteries feel solid and the charger connects solidly, confidenlty sitting them in place for charging.
They charge fast enough (not slow or anything, exactly what you expect) and the charger plate feels solid.
The batteries feel solid and the charger connects solidly, confidenlty sitting them in place for charging.
They charge fast enough (not slow or anything, exactly what you expect) and the charger plate feels solid.
30/08/2025
The batteries work very well, and it’s great not having to trip over power cords or deal with low-battery anxiety anymore. At the end of the day, they’re batteries—it’s a pass or fail situation, and they definitely pass.
However, I do have the same batteries from Neewer, and I have to say I prefer the charger that came with those. Aesthetically, the Neewer charger looks better to me. Would I pay more for it? Probably not. But if everything else were equal, I’d likely choose the Neewer option just for the charger.
However, I do have the same batteries from Neewer, and I have to say I prefer the charger that came with those. Aesthetically, the Neewer charger looks better to me. Would I pay more for it? Probably not. But if everything else were equal, I’d likely choose the Neewer option just for the charger.
22/08/2025
With a 900mA discharge current, one battery tested at 8500 and the other at 8800, which is higher than the advertised capacity. Usually, we see the inverse.
The charger consumes 5W for each battery, even with a single battery, the charge is slow. Even with USB-C. This mean 11-12hours of charging time. Charging LED's are inverted compared to battery position. This is not the best charger, but this is accurately what is described.
The charger consumes 5W for each battery, even with a single battery, the charge is slow. Even with USB-C. This mean 11-12hours of charging time. Charging LED's are inverted compared to battery position. This is not the best charger, but this is accurately what is described.
19/08/2025
This a great set of NP-F970 batteries and charger. The batteries work just as well as the original Sony one, costing a fraction of the latter (the NP-F970 is $229 on Sony's website). There is a difference in specs between the two: the Sony battery is 7.2 V whereas these K&F are 8.4 V but they are both rated as 6600 mAH so there might not be a noticeable difference in real-life usage.
At around $70, this set is a good value however it's too early to tell if they last as long as the OEM model. I will update this review if my opinion of them changes.
At around $70, this set is a good value however it's too early to tell if they last as long as the OEM model. I will update this review if my opinion of them changes.
16/08/2025
The battery have no button to check it charge level, and the charger is very basic (but support USB-C).
I've just done a capacity test, and I got 55Wh off one, and 57Wh off the second with a 1amp load. While the battery say it rated for 47.52Wh, so the battery offer more than the advertized capacity, which is perfect in my book. Long term capacity test will have to be done on them in the future, but so far it look good
I've just done a capacity test, and I got 55Wh off one, and 57Wh off the second with a 1amp load. While the battery say it rated for 47.52Wh, so the battery offer more than the advertized capacity, which is perfect in my book. Long term capacity test will have to be done on them in the future, but so far it look good
12/08/2025