Seeing the Low Battery alert on your smartphone is enough to send anyone into a frenzy. 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.手机表明电量严重不足时我们就不会莫名深感情绪。一组研究人员早已寻找了解决办法，不仅可以让你自己给自己的设备电池，还可以在没电源组的情况下将自己的电量共享给必须的人。

Called PowerShare, this technology consists of flexible coils and docking aids embedded in a smartphone or smartwatch to transfer power to devices just by touching them together.这款取名为“能源共享”的设备主要由软线圈和接入工具构成，将其张贴在智能手机或智能手表上，只要把另一只手机贴上去就可以“借”电来差使。There are a number of products on the market that provide Wireless Power Transfer (WPT) for smartphone users that power their phones without the need of an outlet. Although power packs and mobile hand generators are good back-ups, they can be bulky and a nuisance when traveling.市面上可可供智能手机用户在需要电源插座的情况下电池的无线电缆设备不在少数。虽然一些电源组和移动手摇发电还可以起着救急起到，但是对于旅行者来说轻巧又困难。Once the technology is placed inside a smartwatch or smartphone, simply tap it with another device and watch it charge.只要在智能手表或智能手机应用于此项技术，两种设备用力触碰之后可展开电池。

The creators estimate that around 12 seconds of charging would give users one minute of talk time and two minutes would generate enough power to watch four minutes of a video.发明者估算，用户只需电池约12秒之后可通话1分钟，电池2分钟可看视频4分钟。The average Wireless Power Transfer gadget consist of at least two coils, one located in the power transmitter and the other in the power receiver, reports LiveScience.美国生活科学网报导说道，一般来说无线电缆设备最少包括两个线圈，一个在功率发射器中，一个在功率接收器中。As electricity moves through the power transmitter coil, it creates an electromagnetic field that sends a charge to the next coil.当电流穿越功率发射器中的线圈时会产生电磁场，向接收器运送电量。

To develop PowerShare, researcher experimented with a variety of different power transmitters and receiver coils.为了研发“能源共享”设备，研究人员对多种不同的功率升空和接管线圈展开试验。In order to recreate the magnetic shielding, they used ferrite plate and copper tape placed on the back of coils – this hindered transmitted energy from getting close to human tissue.他们将铁酸盐板和铜带置放线圈背部构成磁屏蔽，这样可以防止传输的电量过分相似人体。The researchers also found that flexible coils can be used in the system and are ideal for smartwatch straps.他们还找到这种硬线圈正好合适，是智能手表带的最佳自由选择。

Our design emphasizes safety, minimizes form factor, presents flexible coils and shows real world power transfer up to 3.1 volts, said the researchers.研究者回应：“我们的设计以安全性为主要考量，最小化外形因素，以软线圈为材料，确实构建了电力传输高达3.1伏特。However, just like most new technology PowerShare does have its limitations – twice as much energy needs to be transmitted as is received.然而，与大多数新技术一样，“能源共享”也有自身的局限性，即接管的电量只有发送到电量的一半。

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