Amazon.com : Ultrapro Battery Grip Bundle for Nikon D3400: Includes Vertical Battery Grip, UltraPro Accessory Bundle : Electronics
Jupioshop. Battery Grip for Nikon D3400
Nikon D3400 DSLR Camera | Interchangeable Lens DSLR Camera with SnapBridge Connectivity
D3400 XS Power 12VDC AGM Car Audio Battery 3300A 65Ah Group 34 - Sparked Innovations
Amazon.com : Vivitar Deluxe Power Battery Grip for Nikon D3400 Bundle with Rechargeable Li-ion Battery, Individual Charger for Nikon, ens Cleaning Pen and Universal Shutter Release Remote Control : Electronics
Amazon.com : Ultrapro Battery Grip Bundle for Nikon D3400: Includes Vertical Battery Grip, UltraPro Accessory Bundle : Electronics