Power your Sony a7S III camera for extended periods from a D-Tap power source with the Kondor Blue D-Tap to NP-FZ100 Dummy Battery Cable. This coiled cable extends from 16 to 36" so it stays neat and out of the way when the extended length is not needed. The cable supports 10 to 18 VDC input power and provides regulated 8V output up to 2A.
The power regulator is built into the dummy battery, so it doesn't impact the coiled cable. The cable can also power your Sony a1, a9 II, a9, a7R IV, a7R III, a7 III, a7 IV, and a6600 cameras.