| abstract |
Provided is an electrical storage device, comprising: an electrical storage unit including one or more batteries; a first control unit configured to perform control related to the electrical storage unit; a first power line configured to output the electrical storage unit The first electric power is supplied to the load; the second electric power line is used to supply the second electric power smaller than the first electric power to the second control unit of the external device, and the communication line is used for the first control unit and the second control unit. Communication between two control units. |