At least an embodiment of the invention enables 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 may be provided with: a battery pack provided with a battery and a memory； and a work-machine main body. The work-machine main body is provided with: a work unit for performing prescribed work； a work-machine controller； and a memory. When the battery pack is attached to the work-machine main body, information corresponding to information related to the purchase date or sale date and stored in memory is saved in memory.
