| 摘要 |
The present patent application relates to a battery pack for connecting to a cordless power tool to supply power thereto, the battery pack may supply two volumes or more than two volumes of voltage or capacity to the cordless electric device, the battery pack provided with a first connection terminal set which electrically connected to a battery cell set, the first connection terminal set provided with a transmission switch, shift the transmission switch to connect two sets or more than two sets of battery cell sets in series or in parallel so that output two volumes or more than two volumes of voltage or capacity.
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