A power delivery system for wirelessly delivering power to a target device , the power delivery system comprising: a power source operable to source alternating current power; a communication module configured to receive, via magnetic coupling and/or via RF communications, a request for power delivery and a wireless communication from the target device , the wireless communication including target device authentication information; a sending resonant coupling component operable to couple the alternating current power to a coil for wireless power transmission; characterized in that the power delivery system further comprises: a target device authenticator coupled to the communication module , the target device authenticator configured to select, based on the target device authentication information, a target resonant frequency to be used for transfer of wireless power to the target device ; wherein the sending resonant coupling component is coupled to the power source and to the target device authenticator , the sending resonant coupling component is configured to receive information from the target device authenticator regarding the target resonant frequency; and a power transmitting unit capable of dynamically tuning wireless power transmission to the target resonant frequency, wherein the target resonant frequency is specified dynamically. a power source operable to source alternating current power; a communication module configured to receive, via magnetic coupling and/or via RF communications, a request for power delivery and a wireless communication from the target device , the wireless communication including target device authentication information; a sending resonant coupling component operable to couple the alternating current power to a coil for wireless power transmission; characterized in that the power delivery system further comprises: a target device authenticator coupled to the communication module , the target device authenticator configured to select, based on the target device authentication information, a target resonant frequency to be used for transfer of wireless power to the target device ; wherein the sending resonant coupling component is coupled to the power source and to the target device authenticator , the sending resonant coupling component is configured to receive information from the target device authenticator regarding the target resonant frequency; and a power transmitting unit capable of dynamically tuning wireless power transmission to the target resonant frequency, wherein the target resonant frequency is specified dynamically. a target device authenticator coupled to the communication module , the target device authenticator configured to select, based on the target device authentication information, a target resonant frequency to be used for transfer of wireless power to the target device ; wherein the sending resonant coupling component is coupled to the power source and to the target device authenticator , the sending resonant coupling component is configured to receive information from the target device authenticator regarding the target resonant frequency; and a power transmitting unit capable of dynamically tuning wireless power transmission to the target resonant frequency, wherein the target resonant frequency is specified dynamically. <EOS>