A receiver (108, 500) for conveying energy from a transmitter to a load, the receiver (108, 500) in a near-field of a transmit antenna of the transmitter, the receiver (108, 500) comprising: means for receiving wireless power; means for selectively coupling or decoupling a first terminal of the means for receiving to or from an output; means for selectively coupling or decoupling a second terminal of the means for receiving to or from the output; means for selectively coupling or decoupling the first terminal of the means for receiving to or from a ground voltage; and means for selectively coupling or decoupling the second terminal of the means for receiving to or from the ground voltage; means for comparing a current through the first terminal to a threshold current; means for comparing a current through the second terminal to the threshold current; wherein during a charging phase for storing energy within the means for receiving wireless power, the means for selectively coupling or decoupling the first terminal to or from the ground voltage is configured to couple the first terminal to the ground voltage and the means for selectively coupling or decoupling the second terminal to or from the ground voltage is configured to couple the second terminal to the ground voltage; and during an output phase for transferring the energy from the means for receiving wireless power to an output coupled to the load, the means for selectively coupling or decoupling the first terminal to or from the ground voltage is configured to decouple the first terminal from the ground voltage and the means for selectively coupling or decoupling the second terminal to or from the ground voltage is configured to couple the second terminal to the ground voltage and the means for selectively coupling or decoupling the first terminal to or from the output is configured to couple the first terminal to the output, wherein the receiver switches from the charging phase to the output phase in response to the current through the second terminal exceeding the threshold current. means for receiving wireless power; means for selectively coupling or decoupling a first terminal of the means for receiving to or from an output; means for selectively coupling or decoupling a second terminal of the means for receiving to or from the output; means for selectively coupling or decoupling the first terminal of the means for receiving to or from a ground voltage; and means for selectively coupling or decoupling the second terminal of the means for receiving to or from the ground voltage; means for comparing a current through the first terminal to a threshold current; means for comparing a current through the second terminal to the threshold current; wherein during a charging phase for storing energy within the means for receiving wireless power, the means for selectively coupling or decoupling the first terminal to or from the ground voltage is configured to couple the first terminal to the ground voltage and the means for selectively coupling or decoupling the second terminal to or from the ground voltage is configured to couple the second terminal to the ground voltage; and during an output phase for transferring the energy from the means for receiving wireless power to an output coupled to the load, the means for selectively coupling or decoupling the first terminal to or from the ground voltage is configured to decouple the first terminal from the ground voltage and the means for selectively coupling or decoupling the second terminal to or from the ground voltage is configured to couple the second terminal to the ground voltage and the means for selectively coupling or decoupling the first terminal to or from the output is configured to couple the first terminal to the output, wherein the receiver switches from the charging phase to the output phase in response to the current through the second terminal exceeding the threshold current.