A spinal cord stimulation (SCS) system provides multiple stimulation channels, each capable of producing up to 10 mA of current into a 1 K load. The SCS system further includes a replenishable power source, e.g., a rechargeable battery, that requires only an occasional recharge, and offers a life of...http://www.google.es/patents/US6516227?utm_source=gb-gplus-sharePatente US6516227 - Rechargeable spinal cord stimulator system
