Patent ID: 8411870

Claim:
An electronic apparatus comprising: a speaker; a terminal configured to receive an audio signal from an external device; an amplifier configured to amplify the audio signal received from the terminal, and to output the amplified audio signal to the speaker; a battery; a power supply circuit configured to supply power from the battery to the amplifier when no external power is supplied; a switch configured to switch between a first path by which a sound controller operating when the electronic apparatus is in an operative state is connected to the amplifier and a second path by which the terminal and the amplifier are connected to each other without passing through the sound controller; and a controller configured to change the switch over to the second path when the electronic apparatus is in a first non-operative state or a second non-operative state, to control power supply from the power supply circuit to the amplifier based on residual capacity of the battery and a preset first battery level, when the electronic apparatus is in the first non-operative state, and to control the power supply from the power supply circuit to the amplifier, based on the residual capacity of the battery and a preset second battery level different from the preset first battery level, when the electronic apparatus is in the second non-operative state.