Battery Grip Vertical Shutter Release for Nikon D3300
Compatible Vertical Battery Grip for Nikon D3100, D3200, D3300 Digital | CameraPowerPro
Gloxy Battery Grip for Nikon D3200
Vello BG-N12 Battery Grip for Nikon D3100, D3200, & D3300 BG-N12
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