Dewalt DCB102BPBT 12V - 20V MAX Dual Port Charger with 4.0 Ah Bluetooth Battery Pack Charges two 12V-20V MAX battery packs simultaneously Two USB ports to charge compatible devices (1.5 Amp max output) DCB204BT Battery with Bluetooth Technology works with DEWALT's ToolConnect App Smartphone with Bluetooth 4.0 required to download ToolConnect App Alerts, Diagnostics, and Inventory Management for productivity and efficiency