Patent ID: 8614526

Claim:
A method in a wireless power transfer system, comprising: receiving power from a power source; providing a substantially unmodulated signal to a transmitter antenna; generating, with the transmitter antenna, a substantially non-radiative electromagnetic field; determining a geographic location of the transmitter antenna; adjusting the electromagnetic field to have a field strength that complies with a standard safety level of the determined geographic location; and transferring power via the substantially unmodulated signal and the substantially non-radiative electromagnetic field to a rechargeable battery of a wireless power receiver the transferred power being at a level sufficient for charging the rechargeable battery, the electromagnetic field having a first field strength that is compliant with a first power standard when the determined geographic location of the transmitter antenna corresponds to a first geographic location and having a second field strength that is compliant with a second power standard when the determined geographic location of the transmitter antenna corresponds to a second geographic location that is different from the first geographic location, and the second field strength being greater than the first field strength and non-compliant with the first power standard.