Patent ID: 7663374

Claim:
A method comprising: obtaining a full charge capacity (FCC) value of a rechargeable battery; determining whether or not said FCC value is greater than an estimated minimum capacity value; in a determination that said FCC value is not greater than said estimated minimum capacity value, displaying a first message to indicate a first health condition of said rechargeable battery; in a determination that said FCC value is greater than said estimated minimum capacity value, determining whether or not said FCC value is greater than an acceptable battery health value; in a determination that said FCC value is not greater than said acceptable battery health value, displaying a second message to indicate a second health condition of said rechargeable battery; and in a determination that said FCC value is greater than said acceptable battery health value, displaying a third message to indicate a third health condition of said rechargeable battery; wherein the estimated minimum capacity of the battery is a changing estimate that is based on a historical performance of the battery.