seiko will this week launch a 1500 wristwatch powered by body heat. using a thermo electric generating system, the seiko thermic wristwatch-on sale in japan from 15 December-exploits the temperature difference between the surroundings and the wearer's arm.
according to its designers, it starts to generate electricity as soon as it is put on the wrist and continues to operate and keep perfect time in "sleep mode" when taken off,