Use this Nikon MB-D10 Multi-Power Battery Grip for enhanced handling capabilities or to extend the battery life of your D700, D300, or D300s. This battery pack accepts one EN-EL3e or one EN-EL4a lithium-ion battery or eight AA batteries if used with the included MS-D10 AA Battery Holder. The design of the grip improves vertical shooting. An additional shutter release button, AE/AF lock button, multi selector, and main- and sub-command dials are incorporated into its design for more intuitive handling.