Just found nice reply on other forum
Dummy battery is easy way but not very safe. If power regulator fail it will burn camera.
V-mount a bit safer because DC port can receive 12 то 20Volts usualy, and Vmount battery can output only 16.8V max. So Weipu6 to D-tap is good choice )
Probably single Sony NP-F plate with passive dummy battery is the simplest, safest and less expensive power solution available right now.