The Panasonic VW-VH04-K Battery Pack Holder Kit is necessary when using large battery packs, such as the VW-VBG6PPK and VW-VBG260, that will not fit properly on small camcorders. The kit allows you to connect your extended life lithium-ion battery pack to the camera via an extension cable, and lets you carry the battery at your waist in the included case.
Panasonic camcorders compatible with the VW-VBG260 and VW-VBG6PPK battery packs include the HDC-SD5, HDC-SD1, SDR-H60, and SDR-H40.
The VW-VBG6PPK alone is compatible with the HDC-HS300, HDC-TM300, HDC-HS250, HDC-SD100, HDC-HS100, HDC-HS20, HDC-TM20, HDC-SD20, HDC-HS9, HDC-SX5, SDR-H90, SDR-H80, PV-GS90, and VDR-D50. Other cameras may be compatible as new models are released.