led灯节能吗？
简单的答案是。当您将其插入血战到底麻将电脑时's usb port, it doesn't快速消耗能量。因此，您可以长时间使用它。某些led灯（如soondar creative spaceman led柔性usb灯）需要电池。但是如果你不这样做'就像带电池的led灯一样，您可以选择其他选项。
a portable charger, better known as a “power bank” is a device that has a sole purpose of being a power supply for devices like smartphones or 平板电脑. power banks have large batteries within them that are able to hold quite a large capacity.