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!