A battery management circuit provides an implantable medical device with power management that allows safe and efficient use of a rechargeable battery. Various ways of monitoring the energy level of the rechargeable battery and controlling the battery recharging process for user convenience and safety...http://www.google.ca/patents/US20070150019?utm_source=gb-gplus-sharePatent US20070150019 - IMPLANTABLE MEDICAL DEVICE POWERED BY RECHARGEABLE BATTERY
