But there is still no lithium battery light enough to power a small electric car over a reasonable distance on a single charge.
但是仍没有轻易做到一次充电能为一辆小型电动车通过一段合理的道路提供电力的锂电池。
They are one of the most popular types of battery for portable electronics, with one of the best energy-to-weight ratios, no memory effect, and a slow loss of charge when not in use.
他们是在便携电子产品领域中最流行的一种电池类型，具有最好的能重比，没有记忆效应，并且在不使用的情况下，充电损失比较慢。
The idea? Charge the battery of an electronic device from across the room—no wires necessary.
这个创意是，跨越房间给电子设备的电池充电，是的，不需要电线。
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