A method for charging a service robot is provided, which includes (a) docking an input terminal of the service robot with an output terminal of a charging apparatus, if an available battery power source falls below a predetermined level; (b) checking wheth...

An electric vacuum cleaner (1) according to the present invention boosts a voltage supplied to a motor-driven blower (6) through the use of a boost converter circuit (19) with a DC power supply (10) as a drive source to thereby increase the output of the m...