That’s One Big Battery: 10 Cell 13000mAh for Eee PC 901

Yowsa! I think this thing may be bigger than the Netbook it attaches to. But I guess if you need some extra juice you might not mind lugging it around. jkkmobile calls it ““the ugliest battery ever.” And for all of that size, you’ll supposedly get 10 to 14 hours of battery life. Available in both black and white. It does not come with an optional servant to help you lug it around. More pictures here.