Meike MK-D3100 Vertical Battery Grip for Nikon D3100 (EN-EL14) at KEH Camera
Nikon-Nixxell MH-24-MCMF Nikon MH-24 Charger for Nikon EN-EL14 Li-ion Battery Compatible with Nikon D3100 DSLR, D5100 DSLR, and P7000 Digital Cameras + B
The last D3100, D3200, D5100, D5200 and P7700 firmware update killed third party battery compatibility - Nikon Rumors
2 Pack Nikon EN-EL14 Replacement Battery With Charger for Nikon D3100, D3200, D5100, P7000, P7100, P7700 DSLR Cameras
Powerextra 2 Replacement Battery and Dual Battery Charger with LCD Display for Nikon EN-EL14, EN-EL14a and Nikon Coolpix P7000, P7100, P7700, P7800, D3100, D3200, D3300
EN-EL14 14a Battery for Genuine Nikon D3100 D3200 D3300 D5100 D5200 D5300 Bulk P 18208271269 | eBay