Patent ID: 6051958
Filing Date: 2000-04-18
Classification: H01M,Y02E

Abstract:
An apparatus for charging a rechargeable battery in a two-way pager, the pager having a transmitter, a main battery for supplying a main power source voltage, and the rechargeable battery for supplying a transmission power source voltage to the transmitter, said apparatus comprising:a memory for storing a charge start voltage and a charge stop voltage;a charger for boosting the main power source voltage of the main battery to a driving voltage, detecting a voltage of the rechargeable battery, charging the rechargeable battery by boosting the main power source voltage of the main battery to a charge voltage in response to a charge start signal, and terminating the charging of the rechargeable battery in response to a charge stop control signal, wherein an interval between said charge start voltage and said charge stop voltage being set so that a charge input of 25%-100% is used; anda controller for receiving the driving voltage and the detected voltage, supplying the charge start control signal to said charge when the detected voltage is less than the charge start voltage, and supplying the charge stop signal to said charger when the detected voltage is greater than the charge stop voltage.