Amazon.com : Accessory Kit Compatible with Synergy Digital, Works with Nikon D3100 Digital Camera includes: SDM-1531 Charger, ACD327 Battery : Electronics
Amazon.com : EN-EL14 EN EL14A Battery USB Charger and 2-Pack Rechargeable Batteries Replacement Compatible with Nikon D3100 D3200 D3300 D3400 D3500 D5100 D5200 D5300 D5500 D5600 DF Coolpix P7000 P7100 P7700 P7800 :
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
Amazon.com: FirstPower EN-EL14/EN-EL14a Battery and USB Dual Charger Compatible with Nikon D3100 D3200 D3300 D3400 D3500 D5100 D5200 D5300 D5500 D5600 DF Coolpix P7000 P7100 P7700 P7800 Camera : Electronics
Amazon.com : Nikon D3100 14.2MP Digital SLR Double-Zoom Lens Kit with 18-55mm and 55-200mm DX Zoom Lenses (Black) (Discontinued by Manufacturer) : Slr Digital Cameras : Electronics
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