Although the listing said the battery was at 80 percent, I get about two hours of not very intensive use on battery alone. Obviously, not good performance despite turning on as many energy saving features as I can. I did not expect a used battery to last too long, and I have no idea if it was properly conditioned and maintained y previous owners. But I would have thought an 80 percent battery (whatever that means) would do better. I have ordered a new battery. Otherwise, the machine was in very good shape, especially once I updated the BIOS, drivers and Windows.