Nikon MB-D17 Battery GripNikon MB D17 Battery Grip Nikon SKU: 27169 Helix SKU: NK27169 Key Features The MB D17 is a Multi Power Battery Pack for the D500, increasing the number of shots per charge that you can get. It features a Shutter release button and Fn button for ease in vertical shooting. The MB D17 can be powered by eight AA batteries or by a single EN EL 15 or EN EL 18a Lithium Ion battery. When using the MB D17 with eight AA batteries, use the MS D12 Battery Holder;