System for wireless power transfer that supports interoperability, and multi-pole magnets for use therewith

A method for providing universal or improved compatibility and transfer of wireless power to mobile devices and batteries, comprising the steps of:

• providing a charger including a charger coil and one or more coil drivers, microcontroller units, or other output current and/or voltage controlling components,
• wherein the charger includes a circuit or other components that measures the current through and/or voltage across the charger coil,
• wherein the coil driver, microcontroller unit, or other output current and/or voltage controlling components receives a communication signal from a detection/demodulation or communication circuit, and makes appropriate adjustments to the charger coil drive circuitry to achieve a desired voltage, current or power at a receiver output, for using in powering or charging a mobile device and/or battery, and
• wherein the charger and the receiver initiate communication using a ping process which includes that
• the charger pings at a ping frequency associated with its charger type, and
• the receiver determines the ping frequency of the charger and uses such information to
• determine the charger type, wherein different charger types are associated with different charging protocols,
• select, from within the different charging protocols, a particular charging protocol to be used with the charger according to its charger type, and
• communicate with the charger, using the particular charging protocol, to power or charge the mobile device and/or battery, including communicating information to the charger for its use in
• determining the receiver type, wherein different receiver types are associated with different charging protocols, and
• making the appropriate adjustments to the charger coil drive circuitry to achieve the desired voltage, current or power at the receiver output.