An anti-theft device having an inductive charging coil for wirelessly powering an article of merchandise. A retention member is configured to be attached to the merchandise. A pedestal configured to removably support the retention member. Complementary contacts on the retention member and the pedestal are configured to provide electrical power from the pedestal to the inductive charging coil, when the retention member is at rest on the pedestal. The retention member has an optical transmitter configured to communicate optical signals to an optical sensor. When the article of merchandise requests power increase, the optical transmitter emits a corresponding optical signal, which causes a control unit to increase an output voltage of a power supply supplying power to the electrical contacts of the pedestal. In this manner, an optical communication channel is used to increase the power wirelessly provided from the inductive charging coil to the merchandise.