S-3802s is a portable 2-channel sequential charger for Sony and SWIT V-Mount batteries, which can automatically recognize the type of battery being charged (Li-ion, Ni-MH and Ni-Cd). S-3802S also can be used as an AC adaptor through its 4-pin XLR DC output. S-8172s is a split style V-Mount battery, which can be split into 2 parts of total 160Wh capacity. This product meets the regulations of IATA. The D-tap DC output makes it possible to power the camera and other equipment simultaneously. It has a 4-level LED indicator to give the user a view of remaining power, and a connecting shoe. S-8172S is compatible with SONY L40/L60/L90 Li-ion batteries.