手上有个旧路由器，自带的电源插头找不到了，背面写着 9V,500mA 。翻到两根闲置的电源，一个 12V,500mA，另一个 9V，1A 。用哪个比较好一点？谢谢。
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 | 1 ceflib Mar 18, 2021  1 9V 1A,你这是把物理知识全还给老师了 |
 | 2 blender2017 OP Summary Make sure your new charger voltage matches your original power supply Get a charger that offers the same amperage or more |
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