Abstract: Disclosed is an electrical charger connector comprising a charger plug having connection pins comprising first and second communication pins. The first and second communication pins are arranged to cooperatively engage respective first and second communication pin sockets of a charging socket, to thereby create connections for the sending and/or receiving of at least one communication signal between a charger control system of an electrical charger and a rechargeable energy store control system of an electrically powered device. The first and second communication pin sockets correspond in position and form with respective alternating current, AC, pin sockets of a combined charging system, CCS, socket.

Abstract: A battery charging system may comprise a first charging sub-system including a first charging connection point electrically connected with a first charging circuit and a second charging sub-system including a second charging connection point electrically connected with a second charging circuit. The first and second charging circuits may be electrically connected to a common battery pack. The first charging circuit may be selectively electrically connected, via the first charging connection point, with a first charger unit circuit of a first charger unit of a battery charger system and the second charging circuit may be selectively electrically connected, via the second charging connection point, with a second charger unit circuit of a second charger unit of the battery charger system, thus permitting charging of the common battery pack with current simultaneously delivered from the first and second charger units via the first and second charging sub-systems respectively.