Left: Genuine Panasonic Battery pack for GH5 7.2 Volts/ 14 Wh. Endurance approximately 2 hours providing power for GH5, DMW-XLR1 audio module and Cage Remote Control Power via the top Hot Shoe.
Middle: Panasonic DC coupler for external power. Works only with DC 8.5 Volts or higher. If the voltage is less, an error message shows up on the GH5: “This battery cannot be used…”. I would not recommend to use more than 9 Volts for the supply voltage.
Right: This is a third party product from China. This adapter has a built in chip that basically pretends to be a regular battery. Therefore the 8 V supply power from the V-mount module works perfectly to power the GH5 and the hot shoe accessories.