[問題]為什麼要有兩個不同規格的USB孔?
最近在選充電器，我覺得都是一樣2.1A不好嗎?
難道說對手機或平板電池會有傷害嗎?
個人覺得大廠牌或評價穩定度高的就可以了吧
特別出2A跟1A的用意到底是??
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