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为什么手机用电脑USB充电后明显掉电快?许多人发现手机用USB充电,不仅充不满,而且电量掉得非常快。答案很简单,因为压根就没充满。电脑的USB输出电压为5V,一般都很精准,之所以充不满,是因为USB输出电流小,而充电的最后阶段,需要有涓流充电。涓流充电是用来弥补电池在充满电后由于自放电而造成的容量损失。电池在充满电后,由于自放电损失的容量大约是标称容量的5%。USB电流只有500m A,涓流太
Why is the mobile phone using the computer USB charging significantly faster power? Many people find that the phone with USB charging, not only full of dissatisfaction, and the power dropped very fast. The answer is simple, because there is no root at all. USB output voltage of the computer 5V, generally very accurate, the reason is not satisfied, because the USB output current is small, and the final stage of charging, trickle charge required. Trickle charge is used to make up for the battery capacity loss due to self-discharge after fully charged. After the battery is fully charged, the capacity due to self-discharge losses is about 5% of the nominal capacity. USB current is only 500m A trickle down too