| 摘要 |
PURPOSE:To provide durability by displaying the residual capacity of a battery pack for convenient use and by preventing a capacity displaying means from being out of order even when used in a rough manner. CONSTITUTION:The case 3 of a battery pack is provided with an inserting part 3b to be inserted into the grip of a power tool and a tail part 3a protruded from the grip. The tail part 3a is provided with a capacity display part 3A, the width of which is narrower than an outermost diameter (W). A light emitting diode 4 for displaying the residual capacity of a battery 6 and capacity calculation parts 5 are stored in the capacity display part 3A. The light emitting diode 4 is exposed to and arranged on the surface placed on the back surface (F) of the grip while the battery pack is inserted into the grip of the motor-driven tool. |
