智能手机电池的核心仍然是锂离子，普遍存在的电池容量在3000mAh上下，普通5V/1A的充电器充满电池需用3～4小时，快充技术可以把时间压缩到1小时左右，大大提升了效率。从物理学角度看，充电功率等于电压与电流的乘积。在电池电量一定程度的情况，功率大小意味着充电速度的快慢。
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