K&F Concept V Mount Battery 99Wh 6700mAh with PD100W USB-C Fast Charging, Mini V Lock Battery with D-TAP/USB-A/Dual USB-C/DC/TFT Display/Emergency Light for Camera, Camcorder, Monitor, Video Light

I started of my V-Mount journey with a larger (dimensions) Neewer V-Mount with many ports but only one USB-C. I've now relegated that one to powering my portable key light. This battery is so nice, works well, is smaller with the same capacity, and has two USB-C ports.
I'm trying to think of anything I won't be able to power on a run-and-gun rig. I'm currently powering a Sony ZV-E1, Viltrox D550 Pro external monitor, Ulanzi CU01 Thermostatic (new) fan cooler on low, and a wireless mic receiver. I just finished 5 hrs and and it still had 20% left.

I've been using this battery from K&F for a couple months and I've been really happy with the experience. The battery has really solid construction as well as a bright and reasonably large display. On the back you have the classic V-mount with charging pins that are typical for V-mounts. Truth be told, I think I charged it with these once and used USB-C the rest of the time. There is also a very small light, more on this later.

One side has a power button that if you tap once, you get a quick display of charge status. Pressing and holding will get you a more informative display for charging status that includes the ports and their output. as well as a very useful. When in this configuration, the little light will turn on and give you just enough light to do simple tasks in the dark.

On the other side is a D-tap port with a rubber cover and on the top are the remaining ports are along the top of the battery.

The battery really does deliver as a smaller sized, on the go option to keep your lower power gear running. Great for auxiliary lights and other random pieces of kit you run day to day. I was even able to power a motorized slider with the DC port. All in all, I'm really pleased with the battery and hope it can be cycled and last a long time. Well done!

A lot of power in a small footprint.
What I think that could be improved is to have 2 D-TAP connectors instead of one but for the rest I like what they are delivering with this product.
I added images comparing with a Neewer and one generic with no name.

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.

Great!

Fantastic battery I use for heavy videography work when travelling. This provides ALL DAY power, supports multiple charging, powers by power-hungry Canon cinema camera flawlessly, and just tends to last forever. It is heavy, as all 100 batteries are (I use the Neewer 50 battery more regularly, which is also great) - but this is the one I go to when I just can't afford to run out of power no matter what. Much cheaper than comparable alternatives.

I've come to appreciate the benefits of having a large V Mount battery for many tasks. This K&F battery has 99Wh but is still relatively compact. It has the ports I need, including a powerful USB C 100 watt port.

This battery works perfectly with my video lights that take V Mount batteries natively, but also work with other lights I have that can be powered by USB C. This battery also has a secondary USB C port, but only PD 65W, which is still respectable. There is also a standard USB A port which can provide up to 24 watts. Having a good set of USB ports makes this battery useful beyond the standard photo/video applications and I find it useful in many different applications.

As an avid camper, this battery is also a fantastic power source while away from power. It's a great battery for charging cell phones, recharging camping lights and any other recharging tasks a regular power bank would do.

About the only negative I would mention is it only has one D Tap. Most V Mount batteries have at least two, and sometimes more, so this might be limiting to some professionals that require additional D Tap outlets. But for my purposes, I rarely require more than one at a time, but do need USB ports in addition to the D Tap, so it works out quite well.

I do like that the battery can also be charged by the USB C port, which is a nice feature. I also like the digital power level indicator, which is superior to the standard row of lights to indicate battery levels. Overall, I'm impressed with this battery and is another product from K&F that is working well for me.

I've got a number of V-mount batteries used for lighting between various brands. This K&F battery is a good value. Compared to my Neewer units, the screen is bigger and metal case looks more high tech. Charging is pretty quick when using a PD high wattage chargers. Also functions as a power bank quite well. Battery life is just under an hour when used with my Neewer video lights.

Well built, works great ,last long, good quality , what more can I say other than I just bought 4 more. Worth every red penny.