Ah, well you need TWO old laptops. When I go babysitting and know that they aren't going to come back when they said they would then the second laptop in my bag comes in handy. Of course I could take the power adaptor instead but a second laptop weighs about the same.
Sometimes a bit of time spent with no mains supply makes you value electricity that bit more and how big your carbon footprint really is. You can also decide to dim the screen a bit and do some real work as playing some rubbish video will bring that power meter into the red way before the parents come back.
Also it is a good way of finding out how long the battery actually lasts. One imagines there will be four hours or more but then that isn't necessarily so, particularly if running Ubuntu with the bottom of the machine so nice and toasty.
Sometimes a bit of time spent with no mains supply makes you value electricity that bit more and how big your carbon footprint really is. You can also decide to dim the screen a bit and do some real work as playing some rubbish video will bring that power meter into the red way before the parents come back.
Also it is a good way of finding out how long the battery actually lasts. One imagines there will be four hours or more but then that isn't necessarily so, particularly if running Ubuntu with the bottom of the machine so nice and toasty.