A warming apparatus in which a flexible battery is intimately associated with a heating element by thermo-coupling the heating element to the surface of the flexible battery. The flexible battery is formed in the shape of garments such as gloves or socks with a heating element attached thereto, which...http://www.google.fr/patents/US5486680?utm_source=gb-gplus-shareBrevet US5486680 - Warming system using a flexible battery
