Patent ID: 8310366

Claim:
A method of providing assistance for locating a radio-frequency identification (RFID) device comprising a power source having a power level, and a feedback device, the method comprising: determining the power level of the power source is below a first predetermined power level; transmitting, from the RFID device, a first signal that indicates the power level of the power source is below the first predetermined power level; thereafter, receiving, at the RFID device, a second signal that instructs the RFID device to activate the feedback device; operating the feedback device in response to receiving the second signal to generate a first feedback that indicates the power level of the power source is below the first predetermined power level; thereafter, determining the power level is below a second predetermined power level, wherein the second predetermined power level is lower than the first predetermined power level; and in response to determining the power level is below the second predetermined power level, operating the feedback device to generate a second feedback that indicates the power level of the power source is below the second predetermined power level, wherein the second feedback is different than the first feedback, and wherein operating the feedback device to generate the second feedback is initiated by the RFID device without receiving an instruction to perform feedback operations.