A “LOW battery” alert (提醒) on your smartphone can be quite annoying. But now a new kind of technology will enable you to power your own phone without using a power pack. And, even better, you will be able to share your charge with others in need by just tapping the two devices together. This technology is called PowerShare. It is made up of at least two flexible coils (软线圈) – one in the power transmitter (传送器) and the other in the power receiver – and docking aids (对接工具) that are found in a smartphone or smartwatch.