Patent ID: 7015822

Claim:
A battery capacity and usage system, for use in an electric powered vehicle to monitor battery capacity and to convey the information to the vehicle operator comprising: a microprocessor, comprising: a first input in electrical communication with a current sensor for monitoring the current load on the battery power supply; a second input in electrical communication with a voltage sensor to measure an initial capacity of the battery; a timing apparatus to continuously calculate an application time of the load; and a first output in electric communication with a peripheral device for displaying information; and a memory device in electric communication with said microprocessor having an embedded data table of pre-tested battery characteristics including the relationship between the application time of the battery, the remaining battery capacity, the current load of the battery and the corresponding remaining hours of the battery usage; wherein when said microprocessor receives the load current and the initial capacity of the battery, the data table of the memory device is retrieved to determine and display an available operation time of the battery, the microprocessor further continuously calculates the application time of the load and the load current to continuously update and display the available operation time of the battery usage.