| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack for an electric power tool that can enhance general versatility.SOLUTION: A battery pack 20 is provided with a resistance adjusting unit 23 having an adjusting resistor (resistance plate 24) that can be added to an original internal resistor 29 of a secondary battery 22 in the battery pack 20. Based on a balance with an electric power tool main body 10 side, a second electrical path 26b which bypasses the adjusting resistor (resistance plate 24) is selected if unnecessary, and a first electrical path 26a containing the adjusting resistor (resistance plate 24) is selected if necessary, whereby the internal resistance of the overall battery pack 20 can be adjusted.SELECTED DRAWING: Figure 2 |
