Batteries in laptops and mobile phones are engineered to be discharged over the course of several hours or days, and they only need to last a couple of years.
2
如今在移动电话和笔记本电脑中使用的电池通常都是用钴氧化物作为正极。
The batteries commonly used in today's mobile phones and laptops still use cobalt oxide as the positive electrode.
3
此外，幸亏有笔记本电脑和移动手机制造商的开路，生产锂电池组的技术现正广泛传播。
Besides, the know-how for producing lithium-ion batteries is now widely dispersed, thanks to the pioneering work done by laptop and mobile-phone makers.
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