Canon BP300 Battery Pack for Canon Elan 7n & 7ne SLR Cameras External battery pack dedicated to the Canon Elan 7 and 7ne SLR cameras Can be used with four AA-size batteries (alkaline, Ni-CD, or NiMH) or two CR123A lithium batteries Vertical grip features a shutter release button, on/off switch, and AE/FE lock Allows flexibility in replacing camera batteries in a pinch Provides increased convenience and stability in shooting