The product comes with a good classic packaging from the k&f brand

In the package we find:
- v-mount battery
- charging
cable - package sheets I will

not dwell on the technical specifications because they are already widely mentioned in the product description, but I will tell you about my user experience and impressions.
As soon as we open the package, we immediately notice that the product produced is excellently assembled and there is an excellent choice of materials because most of the housing is made of aluminum in order to fully dissipate heat, but on the front we have a glossy plastic cover that hides a color LCD display to monitor the parameters.
As far as the connections are concerned, we have a v-mount connection, a USB-C, a USB-A, a d-tap and a 12-volt output.
The maximum power supplied by the product is about 50 Wh, which is enough to power a rig including camera and external screen (as in my case) or lights with 50/60 watts.
I tested the product and I was satisfied with it, during use it does not tend to get too hot and even in the presence of high absorption equipment, the heat emitted is well dissipated, the duration is considerable but the power supplied does not allow it to be used on 100 watt cob lights but, it is excellent in the ring to power the entire photographic system including screens and accessories, and it is also an excellent ally for when we have empty equipment or if we need a stable 12-fold output, as in my case for several self-produced LED lights for mobility use.
Charging is fast for about two hours with 65-watt chargers and once charged it can power a MacBook Air without problems in case of editing on the move.

I also made a second use of this battery, using the 12 volt output to power the VHF/UHF radio amateur equipment and even in this case the product turned out to be excellent (great listening time)

In conclusion it is an excellent product not suitable for high power lights but effective for everything else my final rating is 5 stars