An external module is mounted to a person and transmits energy in the light spectrum through the skin to an internal module which converts it to d.c. current with a film photocell. The d.c. current can be used to charge batteries for powering an implant without a break in the skin and to power an implant...http://www.google.ca/patents/US20060085051?utm_source=gb-gplus-sharePatent US20060085051 - ELECTRICAL IMPLANTS
