| 摘要 |
PURPOSE: A portable head lantern is provided to control the brightness and useful life of the lantern by adding an electric device to the lantern. CONSTITUTION: A portable head lantern comprises a lantern unit and an electrical unit which includes a battery connection control switch for controlling the connection of a battery in serial and parallel. The battery connection control switch controls the battery in three modes including a full serial connection mode, a full parallel connection mode, and a partial parallel connection mode. |
