Amazon.com: Synergy Digital Camera Battery, Works with Nikon D7100 Digital Camera, (Li-Ion, 7.0V, 2100 mAh) Ultra Hi-Capacity, Compatible with Nikon EN-EL15 Battery : Electronics
Amazon.com : Wasabi Power Battery for Nikon EN-EL15 and Nikon 1 V1, D600, D610, D800, D800E, D810, D7000, D7100 : Digital Camera Batteries : Electronics
Amazon.com : Battery and Charger Kit for Nikon D7100, D7200 Digital SLR Camera Includes Vertical Battery Grip + Qty 2 Replacement EN-EL15 Batteries + Rapid AC/DC Charger : Electronics
Amazon.com : Nikon MB-D15 Grip Multi Battery Power Pack for D7200 and D7100 Digital SLR Cameras : Electronics
Amazon.com : 47th Street Photo Must Have Accessory Kit for the Nikon D7100, D7000 - Kit Includes: 32GB High-Speed SDHC Card + Card Reader + Extra Battery + Travel Charger + 67MM
Amazon.com : Neewer Vertical Battery Grip Replacement for MB-D15 Works with EN-EL15 Battery or 6 Pieces AA Batteries for Nikon D7100 D7200 Digital SLR Camera : Electronics
Amazon.com : Battery and Charger Kit for Nikon D7100, D7200 Digital SLR Camera Includes Vertical Battery Grip + Qty 2 Replacement EN-EL15 Batteries + Rapid AC/DC Charger : Electronics
Amazon.com: Green Extreme Multi Power Battery Grip (MB-D15 Replacement) for Nikon D7100 & D7200 DSLR Camera, Holds EN-EL15 Battery or 8 AA Batteries : Electronics