Pro series Multi-Power Battery Grip For Nikon D3100/D3200/D3300 – iZONIX
Amazon.com : Neewer Professional Vertical Battery Grip Replacement for Nikon D3100/D3200/D3300/D5300 SLR Digital Camera, Works with 1 or 2 Pieces EN-EL14 Batteries : Electronics
Pro Series Battery Power Grip for Nikon D3100/D3200 Digital SLR Cameras XTNG3100
New Genuine Original Nikon MH-24 Charger for EN-EL14 Battery D3100 P7700 P7800 | eBay
Zell A 2 X Battery & Car Charger Compatible With Nikon D3100 D3200 D3300 D3400 D3500 D5100 D5200 D5300 D5500 D5600 P7000 P7100 P7200 P7700 P7800 Dslr Cameras - Newegg.com
Source MeiKe MK D3100 Vertical Battery Grip pack for Nikon D3100 D3200 EN-EL14 on m.alibaba.com
Nikon MB-D3100 for Nikon D3100/D3200/D5300 Battery Grip by Wasabi Powe – Wasabi Power