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For years energy experts have been telling consumers to unplug their devices and chargers when not in use because a lot of them have high standby currents, so called "vampires"   How much energy do household appliances use?Appliance When on (watts) Standby (watts) Stereo 22 12 TV 100 10 Video recorder 13 1 DVD recorder 12 7 Digital top box 6 5 Computer + peripherals 130 15 Computer monitor 70 11 Laptop computer 29 2 Broadband modem 14 14 Answering machine 3 3 Battery charger 14 1 Mobile ph ...