[custom_adv] A charger left in the socket goes on using up energy even when there's no device connected to it. The power is minimal, though, so it doesn't hit our wallet too much. [custom_adv] TV tuners continue working after you turn them off and waste up to $22 worth of energy a year.Most of us don't even bother switching our tuners to standby mode, thinking that turning off the TV is enough. This results in 5 times the cost. [custom_adv] You did know that pushing the power button sends the TV to standby mode, not turn it off, didn't you? This consumes about $25 worth of energy a year. [custom_adv] Such a little-noticed detail as a working timer can tell you the device is still on. By unplugging such an appliance, you save up to $114 a year. [custom_adv] Even turned off, PCs and laptops go on working. That's why when you unplug them, you can save up to $100 per year.Those who leave their machines in standby mode can multiply this amount by 1.5.