Amazon.com: Battery Charger for Nikon D3100 : Electronics
Amazon.com: UltraPro Nikon D3100 Digital Camera Battery Charger (110/220v with Car & EU adapters) - UltraPro Replacement Charger for Nikon MH-24 Charger : Electronics
Amazon.com : BM Premium 2 Pack of EN-EL14A Batteries and Dual Bay Battery Charger for Nikon D3100, D3200, D3300, D3400, D3500, D5100, D5200, D5300, D5500, D5600, DF Coolpix P7000, P7100, P7700, P7800
Amazon.com: BoxWave Charger Compatible with Nikon D3100 (Charger by BoxWave) - Digital Camera Battery Charger, Car Charger for Camera Batteries for Nikon D3100, Nikon D3100 | Coolpix P7000 : Electronics
Amazon.com : Micro USB Battery Charger for Nikon D3100, D3200, D3300, D3400 Digital SLR Camera : Electronics
Amazon.com : Progo® 2 Channel Dual Battery USB Charger for Nikon EN-EL14 EN-EL14a and Nikon P7000, P7100, P7700, P7800, D3100, D3200, D3300, D5100, D5200, D5300, Df : Electronics