Amazon.com : Phottix Battery Grip BG-D3100 for Nikon D3100 and D3200 : Digital Camera Battery Grips : Electronics
Amazon.com : Fotodiox Aputure Battery Vertical Grip BP-D3100, for Nikon D3100 Multi Power Battery Pack : Digital Camera Battery Grips : Electronics
Amazon.com: SD Card Slot Cover for Nikon D3100, Digital Camera Memory Card Shell Back Door Socket Lid Protector with Spring and Iron Sheets : Electronics
Amazon.com : Nikon D3100 DSLR Camera with 18-55mm f/3.5-5.6 Auto Focus-S Nikkor Zoom Lens (Discontinued by Manufacturer) : Electronics
Amazon.com : STK EN-EL14 EN-EL14a Battery Pack for Nikon D3200 D3400 D3500 D3300 D3100 D5100 D5200 D5500 D5600 D5300 EL14 EL14A ENEL14 ENEL14A EN EL 14 14a D 3200 3300 3400 3500 3100 5100 5200 5500 5600 Grip : Electronics
Amazon.com: Accessory Kit Compatible with Synergy Digital, Works with Nikon D3100 Digital Camera includes: SDM-1531 Charger, ACD327 Battery : Electronics