This is an accessory for those who use and need to use mobile and electronic devices practically around the clock. French designers Mathieu Servais, Lefer Camille, Clément Faydi and Dyson Michael They created the bracelet or the energetic bracelet. It is a green bracelet that serves as a charger for iPods, cell phones and smartphones.

Thanks to the Seebeck effect, the difference in temperature between the surface which touches the skin and the other which is in contact with the air makes it possible to produce electricity which is stored in a battery.

When the user needs to charge a mobile device, he connects it to the bracelet via a micro-USB port and can still have a few minutes of use. The invention also makes it possible to check the capacity of the battery by means of small LEDs.