A method for wirelessly charging a battery of an electronic device, comprising: transmitting a power waveform wirelessly from a wireless power transmitter of a transmitter circuit to a wireless power receiver of a receiver circuit; receiving the power waveform wirelessly at the wireless power receiver of the receiver circuit from the wireless power transmitter of the transmitter circuit; establishing an out-of-band communication channel between the wireless power transmitter and the wireless power receiver; exchanging out-of-band control signals between an antenna of the transmitter circuit and an antenna of the receiver circuit via the out-of-band communication channel; producing, by the receiver circuit, of a direct current, DC, output voltage from the received power waveform; and charging, by the DC output voltage, a battery coupled to the receiver circuit in response to the out-of-band control signals; characterized in that the method further comprises: prior to establishing the out-of-band communication channel, establishing an in-band communication channel between the wireless power transmitter and the wireless power receiver; subsequent to establishing the in-band communication channel, transmitting from the wireless power receiver to the wireless power transmitter an in-band control signal via the in-band communication channel requesting to exchange out-of-band control signals between the transmitter circuit and the receiver circuit; wherein the out-of-band communication channel is established in response to the request; subsequent to charging, by the DC output voltage, the battery coupled to the receiver circuit in response to the out-of-band control signals, transmitting from the wireless power receiver to the wireless power transmitter an out-of-band control signals requesting to exchange in-band control signals between the transmitter circuit and the receiver circuit; and subsequently charging, by the DC output voltage, the battery coupled to the receiver circuit in response to the in-band control signals. transmitting a power waveform wirelessly from a wireless power transmitter of a transmitter circuit to a wireless power receiver of a receiver circuit; receiving the power waveform wirelessly at the wireless power receiver of the receiver circuit from the wireless power transmitter of the transmitter circuit; establishing an out-of-band communication channel between the wireless power transmitter and the wireless power receiver; exchanging out-of-band control signals between an antenna of the transmitter circuit and an antenna of the receiver circuit via the out-of-band communication channel; producing, by the receiver circuit, of a direct current, DC, output voltage from the received power waveform; and charging, by the DC output voltage, a battery coupled to the receiver circuit in response to the out-of-band control signals; characterized in that the method further comprises: prior to establishing the out-of-band communication channel, establishing an in-band communication channel between the wireless power transmitter and the wireless power receiver; subsequent to establishing the in-band communication channel, transmitting from the wireless power receiver to the wireless power transmitter an in-band control signal via the in-band communication channel requesting to exchange out-of-band control signals between the transmitter circuit and the receiver circuit; wherein the out-of-band communication channel is established in response to the request; subsequent to charging, by the DC output voltage, the battery coupled to the receiver circuit in response to the out-of-band control signals, transmitting from the wireless power receiver to the wireless power transmitter an out-of-band control signals requesting to exchange in-band control signals between the transmitter circuit and the receiver circuit; and subsequently charging, by the DC output voltage, the battery coupled to the receiver circuit in response to the in-band control signals. prior to establishing the out-of-band communication channel, establishing an in-band communication channel between the wireless power transmitter and the wireless power receiver; subsequent to establishing the in-band communication channel, transmitting from the wireless power receiver to the wireless power transmitter an in-band control signal via the in-band communication channel requesting to exchange out-of-band control signals between the transmitter circuit and the receiver circuit; wherein the out-of-band communication channel is established in response to the request; subsequent to charging, by the DC output voltage, the battery coupled to the receiver circuit in response to the out-of-band control signals, transmitting from the wireless power receiver to the wireless power transmitter an out-of-band control signals requesting to exchange in-band control signals between the transmitter circuit and the receiver circuit; and subsequently charging, by the DC output voltage, the battery coupled to the receiver circuit in response to the in-band control signals.