SDDMWBLF19E Lithium-ion Battery - Ultra High Capacity (2100mAh 7.4v) - Replacement for the Panasonic DMW-BLF19 Battery For the Panasonic Lumix DMC-GH3, Lumix DMC-GH4, Lumix GH4 Replacement battery for the Panasonic DMW-BLF19E, Lithium-Ion (Li-ion) 7.4V (2100mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark