An IC card includes at least one plastic layer, a battery and at least one electronic device embedded in the plastic layer. The battery is electrically connected to the electronic device for providing power to the device. The battery includes an anode, a cathode, and at least one polymer matrix electrolyte...http://www.google.es/patents/US6936377?utm_source=gb-gplus-sharePatente US6936377 - Card with embedded IC and electrochemical cell
