But a group of researchers have developed a solution that not only lets you power your own device, but allows you to share your charge with others in need - without using a power pack.

一组研究人员已经找到了解决办法，不仅可以让你自己给自己的设备充电，还可以在没有电源组的情况下将自己的电量分享给需要的人。