Swit's S-8172S is a clever design of x2 80Wh batteries which lock together to form a single 160Wh battery. The Li-ion contents of each part of S-8172S comply with the IATA safe air transportation regulations. Before taken to airplane or shipped as air cargo, it should be split into 2 parts to meet the IATA rules, and the 2 parts should be reassembled when power the camera after air transportation.