When I first looked at the Nyko Energy Pack, a rechargeable battery pack designed for the Balance Board, I was dubious. I had no problem believing that the thing could function (as in be charged and make the balance board work), but I thought the form factor indicated a hack job. As it turns out, that was dumb and wrong of me. Though it may look unmistakably kludgey (involving a battery pack to which a cord is attached, which is then attached to another cord, which then goes to the wall), the Energy Pack is smartly designed, unobtrusive, and easy to use.