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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.

This V mount battery is a powerhouse for any serious videographer. It has a huge power reserve, keeping your equipment running for extended periods. The LED screen is a handy feature, providing clear and easy-to-read information about the battery status. With multiple outlets, it can power various devices simultaneously, making it incredibly versatile I used it to charge my phone most of the time and it had multiple charges in it. This battery is a reliable and essential addition to any professional setup.

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.

Very clearly for Professional use, and it would be overkill for all but the keenest amateurs. A serious amount of power with digital display and fast charging. Keenly priced too, given what it delivers.

Really enjoying this. Built very well and the screen read-out is super handy for knowing what is charging and how fast it's charging.

Only issue I could mention is that the USB-C ports aren't on individual circuits, so if you plug in a new thing to an empty USB-C port, when you already have your camera with a dummy battery on the main port, the battery will drop connection to the camera (killing your recording) as it re-negotiates the charge with the addition of the new device. Slight bummer but not a big deal, just something to keep in mind. Also wish the screen was a bit sharper.

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

What I do like:
The display. I was surprised to see that this charger has really become my go to for testing electronic devices. Yes, due to the heavy duty nature of it, it does get used for charging devices all over our home. But what I like about it is the display that will tell you what's happening with the charge that most devices simply don't address. This has become incredibly handy for testing. For example, my daughters tablet just stopped charging one day. I tried numerous dongles and cables and nothing. Thanks to this I was able to plug it in and see what was going on. Similar situation with a set of earbuds that I have.
Charges pretty much anything and will charge a lot before needing to be recharged itself. I think the advertised recharge time is also pretty correct. I would put it at about approximately 2-3 hours.
Build quality, seriously feels like a brick.

What I dont like:
My complaints are really a bit minor but one couldve been an issue. As this was nearing a recharge I figured Id plug it in and get it filled up. Sadly, I lost the manual and instead looked at the product page. Which shows C1 as being the in/out. This is incorrect. C2 is the in/out. C1 is for charging only. I had this plugged into an outlet for 30+ minutes and noticed that the battery level was going down... I switched ports and the display screen changed to a charging screen and off it went. I guess I was charging my house for a bit??? My other complaint again has to do with the product images which shows the port cover as being something that flips up. It does not. The charge cover is a rubber cap that doesnt attach to the device unless you're not using it. Its either on, or its off.

I shoot video mainly with my phone for interviews, but I also have a Blackmagic Cinema 4K and a Sony a7 iii that I use for video. I got tired of small batteries, and decided to look for a single larger battery I could mount to my tripod and run a cord for D-Tap to the camera.
This K&F Concept 99Wh Battery is a great find!
It uses a mini V-Mount plate on the back so I can clip it to a pipe/tripod leg mount securely and quickly. I have access to a D-Tap plug as well as USB-A and USB-C, and a DC out connector. Running a line up to my camera is simple and safe.
This supplies 99WH, which means you can take it on airlines in your carry-on bag. I made a copy of the instructions to bring with me just in case TSA wants to double-check the power rating.
I really like the clean display. I can check overall power percentage, and also get a breakdown of current draw across the DC and USB plugs if I have my phone or mics charging on the battery.
This has lasted me about 6 hrs, running my Sony and a light kit; I haven't shot as much as I had planned this past month, but I'm really liking this so far.
This K&F Battery is a great size. This is so designed for a travel bag there is no excuse not to take it with you!

I have wanted a D-Tap battery for my Fuiji GFXs, for a long time. I have owned the D-Tap attachment for a few months, but held off on the battery until I found one I liked. This one I really, really like.

K&F are a group that understand the appeal of quality for many buyers. Of course cost is always an issue, but I also want something that will last. This is the one. nThe battery has two USB "C" 3.0 PD ports, a similar USB "A" 24w out, a 12 volt out, a BP point for pro video, a 16.8v D-Tap out, and.... an emergency light - of course. And I don't know what special elixir they have in this battery, but it accepts a charge like sand accepts water - it was amazing to watch.

This battery is designed to meet multiple needs, and it does so with class. It will charge or power just about anything you have, and for me, those long time lapse sequences are set it, forget it, and come back in the morning. The battery is pro grade in every way, and I highly recommend it