Multi-function remote control and a method for obtaining residual power

A multi-function remote control which is supplied power by a rechargeable battery, the multi-function remote control comprising:

• a micro controller unit (MCU) coupling to the rechargeable battery and then charging or discharging the rechargeable battery;
• a display unit;
• a button unit including pluralities of functional buttons, the functional button outputting a functional signal (Sfunc) to the MCU and then the display unit revealing at least one functional content (Cs1, Cs2, Cs3 . . . ) correspondingly when the functional button is pressed;
• a remote control transmitter transmitting encoded infrared signal by means of the control of the MCU when the MCU receives the functional signal (Sfunc);
• a current detector measuring the current of the rechargeable battery and correspondingly outputting a current-value signal (Si) to the MCU;
• a voltage detector measuring the voltage of the rechargeable battery and correspondingly outputting a voltage-value signal (Sv) to the MCU, the MCU obtaining the residual power of the rechargeable battery by means of analyzing the current-value signal (Si) and voltage-value signal (Sv), and then revealing the corresponding residual power by showing the residual power value (CCPT) on the display unit;
• at least one detachable connector coupling to the MCU, the MCU charging the rechargeable battery when the detachable connector is connected to external power supply;
• whereby, the multi-function remote control might have functions of remote control, charging and revealing residual power.