Nikon mb-d14 highlights for use with the d600 and d610 cameras holds 2x en-el15 or 6 aa batteries extended grip for vertical composition shutter release button for vertical use ae/af lock, multi-selector, dual dials features use this nikon mb-d14 multi battery power pack for enhanced handling capabilities or to extend the battery life of your d600 or d610. This battery pack accepts one or two en-el15 lithium-ion batteries or six aa batteries if used with the optional ms-d14 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.