I bought this to use while traveling after I realized the original battery only gave a couple of hours. With some long international travel coming up, have more power was essential. I get about five hours of regular use with this battery, a little more with the wireless turned off. It is easy to switch the batteries -- just hibernate the computer, unplug one and put the other in. A little disappointed that the battery ruins the sleek form of my netbook by sticking out of the back, but that's just aesthetic. It doesn't get in the way, and the computer still nicely fits in the standard sleeve. Also, it is pretty heavy, especially if you consider I'm now carrying two batteries. But I need the hours, so I take the weight.
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