Neewer Replacement Battery Grip for DMW-BGGH3 Works with Rechargeable Battery DMW-BLF19E Compatible with Lumia GH3, Lumia GH4 Cameras. ^Replacement battery grip for Panasonic DMW-BGGH3. ^Worked with 1pcs DMW-BLF19 Battery, Extra power for your digital video camera / camcorder. ^Can effectively double your Shooting Time; Professional edition with vertical-grip shutter-release button, can hold extra battery for your digital video camera / camcorder. ^Three dedicated buttons for exposure, ISO and WB are equipped in addition to the release button on the top as well as the front / rear dials.