This battery super impressed me!
I am not a professional, but I do use my cam a lot, so it's perfect as it's fast charging!
The quality is superb, seems to be made to last for a very long time.
It's has a screen to indicate how much power is left - very handy.
Plenty of outlet ports too, so any other devices can be charged too.
I do recommend it.

I recently got the K&F Concept 99Wh V-Mount Battery for around $170 for my photography needs. The long battery life is impressive, keeping my gear powered through extensive shoots. The excellent V-mount works seamlessly with all my equipment, making it a reliable addition to my setup. Despite its robust performance, it's surprisingly lightweight, which is a big plus when moving around with a lot of gear.

Overall, it's a solid choice for photographers looking for a dependable battery with great features.

An STG Synergies BTN Enterprises Review!

Pros
Heavy duty power bank
Professional Quality
Fast Charges (in and out)
Good range of connections

Cons
Overkill for average use, but great for professionals

Please see attached video review for unboxing and initial assessment. The product charged easily via USBc. I did not realize that this battery is designed for certain types of cameras - ultimately I found someone with access to that type of device and it worked flawlessly. It also charges other devices without issue and very quickly. No reservations recommending this product.

I have many V mount batteries, but this is the only one I own which has a metal body. While I'm not likely to drop and break a battery, it is nice to know that there is some strength to the construction, which also doesnt add a significant amount of weight. The battery seems to last as long as my other similarly sized batteries and it charged plenty fast. The battery has a nice color display which shows capacity, battery state, error states and power consumption on each of the outputs, of which there are many.

I own many K&F products, but this is my first battery and so far the quality of this battery is as good as everything else I own with the K&F name on it.

Nice quality, good value.

K&F Concept’s 99Wh V-Mount Battery with PD100W

The K&F Concept’s 99Wh V-mount battery is a versatile V-Mount battery with 6700mAh of capacity. It weights in just under 635grams. It’s a flexible battery offering charging dtap or usb-c charging. It takes advantage of high-power USB-C power sources, charging up at 16v/ 5a from my power bank for 80w of charging, from a wall socket the built-in screen suggested it was charging around 99w. Using USB-C it was charged in around 2 hours. This is a great advantage over older dtap only batteries – if you are around a high power dtap charger use it – but a good USB-C wall charger can potentially charge two batteries at once; and is much more compact than my dtap power brick. Using USB-C also needs less kit in my bag’ I always carry a few USB-C cables and most of my other kit charges up from usb-c too. K&F include a good 240w rated usb-c cable in the box.

Regardless of the charging source the screen shows a clear display of the state of the battery charge and lets you know which of the various outputs are discharging when its charged. When charging there is an accurate time estimate to charging being complete. When using a high-power source, the battery does get warm whilst charging.

Power output the flexibility continues; you can run use the vmount port and the BP ports will power your device happily. I have used it in a loop for the last few days running a large LED fill light for the last few days. The screen on the battery shows the drain as 70Watts (the panel of the light says it’s a 70w light, so the meter is accurate.) I found the VB99 lasted a little over 2 1/4 hours constant running on that light. The light runtime is on the higher end for my vmount– if you are shooting off grid this will keep a low power camera rig going for a long while.

If the battery is flat when you need it, you can use the light in an adhoc UPS mode charging and running at the same time; just make sure your input power is greater than the output. Running the light and charging from the same wall adaptor; it added an hour to the charge time which is a good compromise.

Besides the vmount port the battery gives you a 12-volt DC connector; a pair of USB-C’s and a usb-a. Total output is limited to 100watts. I could run the light and power a camera via a usb-c cable at the same time. The batteries usb sockets all sit behind a weather flap; that I found difficult to open with my trimmed nails.

When in use the screen is usually off; there is a button on the side that will let you check the status. You can long press that button to turn on a small light in the back of the battery which is useful for lining it up with a mount in low light; you do need to turn it off again – and the screen doesn’t warn you it’s on. It’s a great idea the UI should warn you it’s on; or it should power off when connected to a vmount.

The manual says the screen face is scratch resistant; time will tell on that. The surround of the battery is metal; which should help keep some heat down in charging; and especially surprising given the relatively low weight – it’s almost 150g lighter than my next lightest 99Wh vmount.
K&F have been on a roll with quality products recently; this vmount filter is another sign they are coming for the professional market.

Very nice battery with plenty of capacity, fast-charge capability. The display is nice with precision of charging and usage status. Since air travel limits the capacity and they don't let you check in lithium ion either, this is a good battery that you can still carry on yet have universal applications especially for pro use. Comes with a nice USB-C cord but no charging brick so bring your own.

The battery does what it's supposed to and charges devices that take usb-c, usb-a, d-tap, and 12v barrel connections. I really like the 240w cable they included (usb-c to usb-c) that includes a strap to keep it nice and tidy when not in use. I also like how there is a light on the back that you can turn on/off by holding down the power button for 3 seconds. I haven't seen this feature on a v-mount battery yet, so it's pretty neat to see them trying something new. The gun metal gray sides look pretty stellar as well and give the battery a nice look that's also different than the rest.

The only things I don't really fancy too much are the display readout and the main plug cover. The cover is a little difficult to get off of the plugs and then it just is in the way when you are trying to access the plugs beneath it. Perhaps this will get easier with use, but as of now it's a bit tricky. As far as the display goes, it feels outdated with large blocky text and doesn't display the readouts in real-time. I am glad it shows the voltage and wattage the port is using though.

All in all, this is a good battery, and I can recommend it. There are many choices out there though, and so far, I have not been let down by any of them (K&F, Moman, Smallrig, Neewer, and ZGCine). These batteries are useful for many things and worth the cost.

It doesn't seem to charge my cell phone any quicker than any other device, but it does charge it. The instructions are in an extremely small font, so they are hard to read. Also, there's little information about how to actually operate the battery (e.g., nothing on how to turn on the emergency light--hold the power button in for a while is the answer). The emergency light is pretty weak.

The display is good and you always know where you stand in terms of power and it doesn't seem to get hot while operating.

Had some issues hooking up a couple of lights to it, but it works well for a camera/monitor/etc backup to keep your devices running longer.