Admit it-you love your smart watch and all the amazing things you can do with it. But the task of keeping it charged can be annoying. A longer battery life would be great—but with batteries, the amount of energy stored correlates with volume, and bigger batteries add bulk and weight. All wearables, including fitness trackers, audio-enhancing hearables that go in your ear, and augmented-reality contact lenses, have a similar power problem. And today's batteries are too bulky and stiff for use in wearables that are woven into textiles or directly mounted on a user's skin.

中文翻译：

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以汗水为动力：扔掉电池：生物燃料将改变可穿戴设备的未来

承认吧 - 您喜欢您的智能手表以及您可以用它做的所有惊人的事情。但是保持充电的任务可能很烦人。更长的电池寿命会很棒——但是对于电池，存储的能量与体积相关，而更大的电池会增加体积和重量。所有可穿戴设备，包括健身追踪器、入耳式音频增强可穿戴设备和增强现实隐形眼镜，都存在类似的功率问题。而今天的电池过于庞大和僵硬，无法用于编织成纺织品或直接安装在用户皮肤上的可穿戴设备。