Name: GyroVu 40" USB to Panasonic GH3/GH4 (DMW-BLF19) Intelligent Dummy Battery Adapter Cable
Brand: GyroVu
SKU: GYGVUSBGH4
Price: 29.95 USD
Availability: Discontinued
Rating: 4.4 (24 reviews)

GyroVu 40" USB to Panasonic GH3/GH4 (DMW-BLF19) Intelligent Dummy Battery Adapter Cable

GyroVu 40" USB to Panasonic GH3/GH4 Intelligent Dummy Battery Adapter Cable

GyroVu

Adorama

Photography

Camera Accessories

Camera Battery Chargers

GyroVu Camera Battery Chargers

GyroVu 40" USB to Panasonic GH3/GH4 Inte...

Top Rated Gear: GyroVu 40" USB to Panasonic GH3/GH4 (DMW-BLF19) Intelligent Dummy Battery Adapter Cable Equipment Type: USB Coupler

USB to Panasonic GH3/GH4  40" (DMW-BLF19) Straight Dummy Battery Intellegent Adaptor Cable

Great turn around delivery

works as desired, but you have to use a 5v USB wall plug and not a 2.4v plug.  If you plug this in and nothing happens, check this first.