Western Publishing Company, Inc.

Mark Johnson-Williams

Zeb Billings

An electrical device characterized by alternative battery power supplies including an electrical circuit, a pre-installed first battery power supply disposed in a non-user-accessible portion of the device and a user-accessible compartment for receipt of a second battery power supply. The first supply is initially operatively connected to the circuit, and the presence of a second supply in the compartment operatively connects the second supply to the circuit to power the circuit regardless of the presence or absence of the first supply in the circuit. Preferably the first supply is mechanically operatively disconnected from the circuit when the second supply is in the compartment.

Growing community of inventors

Half Moon Bay, CA, United States of America

Mark Johnson-Williams