Patent ID: 7705558

Claim:
A charging station for a secondary battery which said secondary battery has a radio frequency energy harvesting diode chargingly associated therewith, said charging station comprising: a charging chamber, said charging chamber having an open configuration and a closed configuration, said open configuration being adapted to the insertion and removal therefrom of said secondary battery in the form of a button cell including a radio frequency energy harvesting diode, said closed configuration being adapted to chargingly providing radio frequency energy at a frequency of from approximately 2.4 to 5.8 gigahertz to said radio frequency energy harvesting diode in said secondary battery, wherein said secondary battery is operatively associated with a hearing aid to form a battery-hearing aid combination, and said closed configuration being adapted to chargingly providing radio frequency energy to said battery-hearing aid combination, and said hearing aid being adapted to providing an indication of a level of electrical charge to a charge controlling member.