PROBLEM TO BE SOLVED: To provide a connector device which allows a user to easily check the state of a battery on hand even when an electric tool is separated from the battery.SOLUTION: A connector device 50 includes: an electric tool side connector part 51a to be electrically connected with gardening clippers； a battery side connector part 52a to be electrically connected with a backpack type battery 40； and a display 51c which is provided close to the electric tool side connector part 51a and displays a state of the backpack type battery 40. Hence, a user can easily grasp the state of the backpack type battery 40 by checking the display 51c located close to the electric tool side connector part 51a, i.e. the display 51c located on hand, even when the user carries the backpack type battery 40 on his/her shoulder. Thus, unlike a conventional connector device, the user does not need to put off the battery every time he/she checks the state of the battery (a high capacity battery). The work efficiency is therefore significantly improved.SELECTED DRAWING: Figure 2
