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A7原装锂电源无法充放电，检测故障是一点锈迹，怎么恢复功能
A7款原装锂电源指示灯不亮，无法充放电故障，经过检测发现电池组有一点锈迹，而故障原因就是由于这里造成，这个故障怎么检测如何维修
电动工具电源维修大全361/417
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