BATTERY AND ELECTRIC DEVICE

Provided are a battery and an electric device. The battery includes an insulation board, a circuit board disposed on the insulation board, and a battery cell disposed on one side of the insulation board in a thickness direction. An electrode terminal is provided at an end of the battery cell facing the insulation board. A busbar is disposed on the insulation board and includes a first connection layer, a second connection layer, and a bent layer connecting the first and second connection layers. The first connection layer includes a main body region and a connection region. The main body region overlaps the second connection layer in the thickness direction, while the connection region does not overlap the second connection layer. The connection region is electrically connected to at least one of the electrode terminal, the insulation board, and the circuit board.