Body heat could even be used to generate electricity.
New technology, dubbed 'Power Felt' has been developed by Wake Forest University in the USA and could help us harness our body heat to recharge iphones, ipods and lots more.
The really cool thing is, it could be really inexpensive - possibly around one dollar for an iphone cover.
The new material uses the difference in temperature to generate energy.
The applications are potentially quite broad. The Power Felt could be used in carseats covers, form part of the car's bodyworks or sit underneath roof tiles and around hot water pipes.
Can you think where Power Felt might be really effective?
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