The Canon BG-E9 battery grip is the for the Canon EOS 60D digital SLR and offers the user multiple power options plus vertical control. The BG-E9 will hold up to 2 Canon LP-E6 batteries to offer a greater shooting capability.
As an alternative the BG-E9 grip can be used with 6 AA batteries. This not only increases shooting times but also means that the universally available AA batteries can be used in the event that your lithium ion batteries fail. The Canon BG-E9 grip also makes holding your 60D in the vertical or portrait position more comfortable.
Shutter release, main dial, AF Point Selection, AF/FE Lock, Index, Aperture, Exposure Compensation Button and Reduce Button functions are all replicated on the grip, making operation of the camera more convenient when shooting in the portrait format.