A hybrid battery power source for implantable medical use provides a generally constant low internal resistance during discharge and avoids voltage delays of the type that develop as a result of run down-induced resistance increase in Li/SVO cells. The hybrid battery power source utilizes two batteries...http://www.google.ca/patents/US7079893?utm_source=gb-gplus-sharePatent US7079893 - Hybrid battery power source for implantable medical use
