Nokia E-Cu (E for environment, Cu for Copper)
Heat-conductive charging system
Creating a charger-free cellphone future
This mobile phone concept by London designer Patrick Hyland can be charged by the heat in your pocket. An integrated thermogenerator converts heat from any source into electrical energy to charge the phone, whether while being carried in your pocket or placed on top of a radiator.
The case of the phone is made of copper and features engraved heat-sinks in the shape of dried earth.