Information is communicated between an RFID tag and first and second
readers. A first transceiver of the RFID tag is controlled so that the
first transceiver communicates with the first reader and so that the
first transceiver has substantially longer periods during which the first
transceiver is not in communication with the first reader than when the
first transceiver is in communication with the first reader. A second
transceiver of the RFID tag is controlled so that the second transceiver
communicates with the second reader at least during the periods when the
first transceiver is not in communication with the first reader. The RFID
tag may also have a battery, a switch coupling the battery to at least
the first transceiver, and a controller that operates the switch in a
duty cycle such that power is provided by the battery to the first
transceiver during ON times of the duty cycle and such that power from
the battery to the first transceiver is interrupted during OFF times of
the duty cycle.