Vello BG-N12 Battery Grip for Nikon D3400 BG-N12-D3400 B&H Photo
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
Battery Grip for Nikon D3400 DSLR Camera Vertical Shutter Release Button Work | eBay
Travor BG-2V Vertical Battery Grip for Nikon D3400 DSLR Camera Work with EN-EL14 Battery - AliExpress
Vivitar Battery Grip for use with Nikon D5300, 3300, 3200 and 3100 Cam – Camera Exchange
Nikon D3400/D3500 DSLR Camera with 18-55mm Lens VR & 70-300mm DX AF-P Lenses with 64GB Card|Case|Battery|Grip|Tripod|Filters|Kit | NJ Accessory/Buy Direct & Save