在笔记本电脑和移动电话中的电池被设计成可在数小时或数天过程中连续使用，且它们只需有数年寿命。

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.

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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.

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因此，笔记本电脑行业出现了一个小趋势：更多的电子产品被设计成使用内置的可充电电池。

So, a small trend has begun in the industry: More electronic products are being designed with their rechargeable batteries sealed inside.

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