The XA122 battery board is designed to be used with the XM122 IoT module, enabling a batterypowered radar module in a small formfactor. It is easily connected to the XM122 IoT module via a board-to-board connector and contains a CR2477 battery holder (battery NOT included), tantalum capacitors for handling current peaks from the XM122 IoT module and a switch preventing the battery from being short-circuited if inserted incorrectly. It also enables access to some of the interfaces in the board-to-board connector via test points.