I have a Nikon D5000, and I went to Best Buy on Black Friday, so I decided that I might want to purchase an extra battery for it. I asked one of the employees how much one was, and he said it would be around $60-$70, so I decided against it. (Now I realize that he might have been mistaken) But today I saw this battery grip here: http://www.linkdelight.com/index.ph...mera-+-2-EN-EL9a-/Detailed-product-flyer.html It's only $59.99 and comes with two batteries. The problem is that I'm not sure if I would really need the grip. It seems neat, but I don't know if I'd like the extra weight on it. But it does come with two batteries, so I might purchase it just for that. Does anyone have experience with these? Do you think the batteries might have a very week capacity, and I would just be better off purchasing the stand-alone battery?