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充電器電壓一般為5V,這個5V經過充電電路後變為4.2V,然後再給電池充電. 不同的手機,不同電池其充電電流大小不一定相同,一般慢充電流為0.1C(比如電池為1000mAh,則充電電流就為100mA左右).
化學能轉化成電能
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