A trickle-charged Radio Frequency Identification, RFID, device comprising: a first main antenna element configured to receive one or more interrogator signals from one or more RFID readers; a first power harvester/RF-to-DC converter (320, 320") electrically connected with the first main antenna element and configured to obtain power from each of the one or more interrogator signals and convert the one or more interrogator signals to DC signals; an intermediate storage device (330, 330") electrically connected to the first power harvester /RF-to-DC converter and configured to collect the converted DC signals from the first power harvester/RF-to-DC converter; a primary storage device (326, 326") connected with the intermediate storage device via a circuit (328, 328") configured to transfer charge stored in the intermediate storage device when the stored charge reaches a predetermined level; said circuit (328, 328") comprising switches (670 and 671) which permit the periodic flow of the DC signals into the intermediate storage device (330, 330") while preventing the intermediate storage device from discharging into the primary storage device (326, 326") until the pre-determined level of collected charge has been met in the intermediate storage device, wherein the switches comprise: 1) a first switch that is disposed between the power harvester/ RF-to-DC converter (320, 320") and the intermediate storage device (330, 330"), and 2) a second switch that is disposed between the intermediate storage device (330, 330") and the primary storage device (326, 326"), wherein the circuit is configured to: close the first switch, upon receipt of the one or more interrogator signals lacking a tag inquiry, in order for the circuit to direct the DC signals to the intermediate storage device until the pre-determined level of collected charge has been met in the intermediate storage device; and close the second switch when the pre-determined level of collected charge has been reached in order for the circuit to transfer the charge from the intermediate storage device (330, 330") to the primary storage device (326, 326"). a first main antenna element configured to receive one or more interrogator signals from one or more RFID readers; a first power harvester/RF-to-DC converter (320, 320") electrically connected with the first main antenna element and configured to obtain power from each of the one or more interrogator signals and convert the one or more interrogator signals to DC signals; an intermediate storage device (330, 330") electrically connected to the first power harvester /RF-to-DC converter and configured to collect the converted DC signals from the first power harvester/RF-to-DC converter; a primary storage device (326, 326") connected with the intermediate storage device via a circuit (328, 328") configured to transfer charge stored in the intermediate storage device when the stored charge reaches a predetermined level; said circuit (328, 328") comprising switches (670 and 671) which permit the periodic flow of the DC signals into the intermediate storage device (330, 330") while preventing the intermediate storage device from discharging into the primary storage device (326, 326") until the pre-determined level of collected charge has been met in the intermediate storage device, wherein the switches comprise: 1) a first switch that is disposed between the power harvester/ RF-to-DC converter (320, 320") and the intermediate storage device (330, 330"), and 2) a second switch that is disposed between the intermediate storage device (330, 330") and the primary storage device (326, 326"), wherein the circuit is configured to: close the first switch, upon receipt of the one or more interrogator signals lacking a tag inquiry, in order for the circuit to direct the DC signals to the intermediate storage device until the pre-determined level of collected charge has been met in the intermediate storage device; and close the second switch when the pre-determined level of collected charge has been reached in order for the circuit to transfer the charge from the intermediate storage device (330, 330") to the primary storage device (326, 326"). close the first switch, upon receipt of the one or more interrogator signals lacking a tag inquiry, in order for the circuit to direct the DC signals to the intermediate storage device until the pre-determined level of collected charge has been met in the intermediate storage device; and close the second switch when the pre-determined level of collected charge has been reached in order for the circuit to transfer the charge from the intermediate storage device (330, 330") to the primary storage device (326, 326").