A battery pack in one aspect of the present disclosure includes a first battery block, a second battery block, and a terminal portion. The terminal portion is configured to output a parallel voltage of the battery block and the second battery block connected in parallel in response to a state where a first electric working machine is connected to the terminal portion. The terminal portion is configured to output a first voltage of the first battery block and a second voltage of the second battery block individually in response to a state where a second electric working machine is connected to the terminal portion.