The purpose of the present invention is to enable data which can be effectively utilized in maintenance work to be acquired from a work-machine main body, in a portable electric work machine capable of having a battery pack attached thereto and detached therefrom. This portable electric work machine (1) is provided with: a battery pack (200) provided with a battery (210) and a memory (230)； and a work-machine main body (100). The work-machine main body (100) is provided with: a work unit (130) for performing prescribed work； a work-machine controller (111)； and a memory (113). When the battery pack (200) is attached to the work-machine main body (100), information corresponding to information related to the purchase date or sale date and stored in memory (230) is saved in memory (113).
