Some electronic devices keep on drawing power, even when they’re “off.” While some of them have a function, like displaying the time or offering remote control functionalities, most don’t. Typical “vampire” appliances can consume up to 25 watts each, an amount that could make a significant difference in your electricity bill by the end of the year.

To help you understand how much “vampire energy” could cost you, and how you can stop draining useless energy from the power grid, Good Magazine, in association with Nigel Holmes, produced this interesting video explaining everything there is to know about “standby power.” Video after the jump.

[Picture: Good Magazine]