symptom

裝咗正確嘅 battery,但按鎖定按鈕時同扳機冇產生任何 motor 反應。

裝咗正確嘅 battery,但按鎖定按鈕同 1. 將鎖定設置為休息狀態,拆除 battery,檢查電池組同工具有冇熱、液體、裂紋或燒焦。

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