Gizmodo pointed us to some research carried out by someone who must be the poster child for having too much time on your hands: he decided to measure the amount of power a laptop uses for each tab open in a browser. The answer, in case you were curious, is 0.19 watts per tab in Safari or Chrome and 0.16 watts in Firefox.
There is some point to it, though: the experiment showed that having 100 tabs open reduces battery-life by around an hour. While I doubt that many of us have quite that many tabs open at any one time, it does suggest that when you’re trying to eek out as much usage as you can from a battery, closing unnecessary tabs will buy you at least a little more time.
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