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A very interesting battery design is to put the battery in the heat source to charge the battery, simply to convert heat energy into electricity.
"Piece Battery" is a very conceptual design, it is very thin, like a Band-Aid. As long as it is affixed to the heat source, it can generate electricity, such as the hot part of a notebook computer, and it can display charging data in real time, and vice versa.
After the battery is fully charged, the battery can be used as an external battery for wireless mobile devices, such as mobile phones and tablet computers. The method of use is the same. It's very simple, and of course it works. The problem is that this is just a conceptual design.
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