Wireless power transfer

A power receiver comprising:

• a second communicator, wherein the second communicator is arranged to communicate with a power transmitter over a communication channel;
• and
• a user interface circuit,
• wherein the user interface circuit is arranged to generate a user alert in response to the second communicator receiving a power restore message from the power transmitter,
• wherein the user interface circuit is arranged to receive a user input,
• wherein the second communicator is arranged to transmit a user action message to the power transmitter in response to the user input meeting a criterion.

A method

• comprising:
• receiving supply power from an external power supply;
• detecting a restoration of the supply power following an outage of the supply power;
• detecting a presence of a power receiver when the supply power is restored;
• arranging a communication channel to a communicator of the power receiver;
• transmitting a power restore message to the power receiver over the communication channel in response to detecting the restoration of the supply power;
• detecting a power receiver user action;
• and
• initiating a power transfer to the power receiver after power restoration in response to the detection of the user action.