Coaster charges phones using energy from hot or cold drinks
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Regular readers of Springwise may remember our recent coverage of the PowerPot, a cooking device that takes advantage of disparities in thermal energy to power phone chargers. Now the Epiphany onE Puck aims to achieve something similar, enabling anyone to charge their handset using hot or cold drinks. The device is shaped like a hockey puck, acting as a coaster for cups and tumblers. It works in a similar way to a Stirling engine – technology that has been around for 200 years – which uses the energy from the heat conduction process to power a constant cycle of expanding…
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