Camcorder, Digital Camera, Handycam, MiniDV

For a large camcorder like Sony FX7 this adds nice rear “ballast” for balance and EIGHT HOURS taping time!
Sony NPF970 L Series Camcorder Battery for the DCRVX2100, HDRFX1, HDRFX7, HD1000U & HVRZ1U Technical Details :

Rechargeable Lithium-ion battery pack designed for Handycam camcorders
Provides up to 18 hours of continuous recording time
6600mAh storage capacity [...]

The HLD-4 is a power battery holder created especially for the E-3. It is equipped with a shutter release button and other essential dials for easy operation during vertical-format shooting.
Olympus HLD-4 E-3 Power Battery Grip Technical Details :

Compatible with Olympus E-3
Power for extended use
Ideal for portrait shooting
Dust & splash proof
Holds [...]