The system consists of a charging base that plugs into the wall and two battery packs that snap into your Wii-motes. Note that you'll have to take off your old snap-on battery covers from your Wii-motes and find somewhere to put them, almost inevitably resulting in losing them. If you plan on using this charging system as your permanent power solution, however, you may not care. Next, there's always the problem of finding a place to put the charging base. Of course, this is a problem with any charging device, but the good thing about the Energizer system is that it looks pretty minimal and modern, matching the design of the Wii itself, so it's not so much of an eyesore. You can also choose between standing the charging base up vertically or laying it horizontally on a surface. Keeping with the minimalist theme, there are no labels or directions on the unit, only a green light to indicate a full charge and an orange one to indicate charging.