PolyPlus's battery may be just that: dip the encapsulated lithium pack into a glass of ordinary water and it produces current that lights up an LED display at the company's conference showcase booth.

而 PolyPlus 电池也许就是这样一种新技术：把密封包装好的锂浸入一罐普通的水中就能产生电流，可将公司展会展位上的LED灯点亮。

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