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there are patents for charging the mobile by using external charger using piezoelectric material,but i am thinking of having a piezo material inbuilt as we type a lot due to which mechanical pressure is created and with the use of the piezo tech we can charge it to some extent.this would be useful while we are travelling or camping somewhere.

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closed as off-topic by Ron J., Robert Cartaino Jul 25 at 16:40

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be about patents, within the scope defined in the faq." – Ron J., Robert Cartaino

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