Remote controller with dual power supply units

A remote controller, for controlling a television, the remote controller comprising:

• a housing;
• a first sub-system, disposed in the housing, comprising:
• a first power supply, for powering the first sub-system;
• a button module, coupled to the first power supply, comprising a plurality of operation buttons, for generating a first signal for controlling the television to perform a first operation corresponding to one of the operation buttons being pressed;
• and
• an infrared transmitter, for transmitting the first signal to the television,
• wherein said first power supply generates power to the first sub-system only when a button of the button module is pressed;
• and
• a second sub-system, disposed in the housing, comprising a second power supply for supplying power continuously to the second sub-system, the second power supply comprising a rechargeable power device, the second sub-system generating a second signal for controlling the television to perform a second operation,
• wherein the second power supply is coupled to the first sub-system, and powers the first sub-system when a button of the button module is pressed and a power of the first power supply is lower than a predetermined value,
• wherein when the remote controller is not in use, the second power supply is connected to a charging transformer.