Systems for charging a battery are provided, the systems comprising: a regulator having an output coupled to the battery and having an input; a wireless charging receiver having an output coupled to the input of the regulator and having an input that receives a power signal from a wireless charging transmitter; a controller having a first input coupled to the input of the regulator, having a second input coupled to the output of the regulator, and having a first output coupled to the wireless charging transmitter, wherein the controller is configured to send, using the first output of the controller, a control signal to the wireless charging transmitter that causes the wireless charging transmitter to change the power signal provided to the wireless charging receiver.