If you are looking to use external power to your Blackmagic pocket 4k/6k camera, the PC-34 cable powers from a power-con (D-Tap) port to the 2-pin Blackmagic connector.

The DC input range is 12-20v.

When using NPF (L-series) batteries, this cable will not work, you will need to regulate the voltage up to at least 12v.