Im currently testing some 'in the field' IDX Company mount and battery packs with the Panasonic DMW-YAGHE unit & GH4.

Straight out of the box the following works;-

1 x IDX C-EBXLR Endura Individual Power System - One V-Mount Adapter Plate with 4-pin XLR Connector

1 x IDX CA-4XLR 4-pin XLR Male to 4-pin XLR Female Cable extension cable

1 x CUE 75 LI-ion Battery (XLR connector plus extra D Type adapter for powering other devices) or longer duration DUO 95 (which features extra two 'D Type' Power Outputs to power other devices plus a powered USB Out too!)

1 x IDX LI-ion Battery charger (for example the VLP PC1 single charger )

Lookout for a full report and video over the weekend regarding maximum recording times with fully charged batteries of the CUE 75 and DUO 95 packs.