Renewable energy
A 'Stirling' idea for charging your cell phone
...one, which is bound to power-down sooner or later. The Epiphany onE Puck is the answer to your problem. You can now multi-task to the max! Use that cup of coffee to recharge both you and your smart phone at the same time.
The possibilities for the Epiphany onE Puck are endless. You only live once, and there is simply t...