If you’re environmentally conscious at all, or if you’re just trying to save a few pennies on your electricity bill, you’re probably aware that a lot of gadgets suck up a surprising amount of energy when in standby mode.
Consequently, many people suggest that you should totally unplug these “energy vampires” when they’re not in use … but how seriously should you take that? Should you be totally unplugging your MacBook charger, or your iPad charger, when it’s not in use?
Over at How-To Geek, Chriss Hoffman wanted to know how much electricity his spare chargers were sucking up when not in active use. So he took a Kill A Watt meter, and tested chargers for the iPhone, iPad, MacBook, Chromebook, Windows laptops, Android phones.
The results? All good. No matter what device you’re using, individually, each charger used 0.0 watts when not in use. And even when you plug six unused chargers into a power strip at once, the collective usage is barely 0.3 watts. That means if you left them plugged in all year, the maximum you’d pay in electricity would be a meager 79 cents… and that’s in the most expensive place for electricity in the entire country, Hawaii.
In short? Don’t worry about your Apple chargers. They’re not energy vampires. Your Apple TV, though, might be another story.
Source: How-To Geek