Amazon.com: Smatree Battery Charging Hub Compatible for DJI Phantom 4/4 Pro/4 Pro V2.0/4 Adv(Charge 3 Batteries One by One, Converting Phantom 4 Battery into Power Bank, Not Include Power Cable ) :
Amazon.com: Viestbel Phantom 4 Battery 15.2V 5870mAh, Intelligent Flight Replacement Battery for DJI Phantom 4 Series Drones| DJI Phantom 4, Phantom 4 Pro, Phantom 4 Pro V2.0, Phantom 4 Advanced : Toys & Games