Patent 8400162 was granted and assigned to Physical Optics Corporation on March, 2013 by the United States Patent and Trademark Office.
A method of monitoring battery capacity comprises determining a starting capacity of a battery; determining an activity coefficient for a device connected to the battery; determining a voltage and current profile for the battery using the starting capacity; determining a voltage and current operating point for the device using the activity value for the device; and determining an updated capacity of the battery using the voltage and current profile for the battery and the voltage and current operating point for the device.