In operating a battery powered vehicle, a battery charger is located at a stationary location but the battery charger control circuit is mounted on the vehicle and powered from the DC battery of the vehicle. During a charging operation, a microprocessor within the battery charger control circuit detects...http://www.google.com.au/patents/US6087805?utm_source=gb-gplus-sharePatent US6087805 - Monitoring and controlling system for battery and battery charger