A wireless communication device may use a battery for power as described in U.S. Pat. No. 6,130,602 entitled ???Radio frequency data communications device,??? or may use other forms of energy and/or power, such as a capacitor as described in U.S. Pat. No. 5,833,603, entitled ???Implantable biosensing transponder.??? Both of the preceding patents are incorporated herein by reference in their entire