I don't have a 2010 but I do have a 2007 17" 2.33GHz C2D MBP and I get 3-4 hours. The only problem is the old 17" batteries tend to warp and explode: http://i

I don't have a 2010 but I do have a 2007 17" 2.33GHz C2D MBP and I get 3-4 hours. The only problem is the old 17" batteries tend to warp and explode: http://imgur.com/wmoTy.jpg http://imgur.com/wmoTy.jpg