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-EL3e 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.