The MB-D10 multi-power battery pack increases the maximum frame advance
rate to 8 frames per second * and extends autonomous operating time
when using batteries. It is ergonomically designed for improved grip
with the camera in the vertical shooting position and is powered by
eight AA-size standard batteries or a specific Nikon battery (for
battery compatibility, see “Related Products” below). Features
alternative shutter-release button, multi-selector and AF start buttons
for use when holding the camera in the vertical shooting position, as
well as secondary main- and sub command dials.