That is why there are so many different types of batteries.
这就是为什么会有这么多种电池。
There are many types of batteries, so lets just talk about the 3 most common.
电池有很多种,让我们来讨论最常用的3种。
The value of many clean-energy technologies, such as new types of batteries or solar cells, lies in whether they can deliver power more cheaply.
许多清洁能源技术(如新型电池或太阳能电池)的价值在于他们能够更加廉价地输送能量。
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