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车载充电器的正负极怎样区分

更新时间: 2020-10-03 00:00:00     

1、如果用万用表,直接用万用表测量,正常指示时,红表笔是正极;

2、没有万用表,可以用1、5伏小电池和6伏小灯泡和充电器串连,查看灯泡亮度后调换电池正负极再查看灯泡亮度,两次应该有明显的不同,其中亮的那一次,电池和充电器正向连接,电池的正极就是充电器的正极;

3、打开车载充电器,用滤波电容和线来判断,滤波电容管脚标有正极或负极,红线一般是正极,黑线一般是负极。

关键词: 车载 充电器 负极 怎样 区分

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