The method of charging a portable rechargeable battery produces an electrical signal representing the battery output voltage. Rapid charging of the battery is initiated by supplying a high charging current to the battery when a signal representing the battery output voltage drops below a preselected...http://www.google.es/patents/US5640079?utm_source=gb-gplus-sharePatente US5640079 - Battery charger for portable rechargeable batteries
Battery charger for portable rechargeable batteries
