
I've recorded many long multi-camera interviews, and while the A7III and RIII batteries are great, I rarely get more than 2 hours of continuous 4K footage. So far the solution has been to attach the power supply to my tripod, which doesn't look very professional. Here is the Smallrig power supply holder! I screwed it to the side of the cage and secured the power supply in place. Requires a shorter USB cable but works great! The power supply I currently have is only 5V, but if I can find a larger one with multiple outputs I can probably power the monitor as well. Definitely a lot cheaper than a V-mount battery! I suppose you can also outfit it with a small battery powered flashlight like the Aputure Amaran or the Boling P1. Like all Smallrig equipment, this part is simple but well designed and built.

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