Wwman 1to3 Battery Charger for Udi UDI U818A WiFi FPV U845A U845 WiFi U28 U28-1 Rc Quadcopter Drone Spare Parts For UDI U818A WiFi FPV U845A U845 WiFi U28 U28-1 Drone. Charger Description: Voltage input: DC 5.0V Current Input:0.45-2-2.5A ,Voltage output: 3.7v 450mAh-500mAh. Support computer,mobile,power bank charger. Charging 3 battery at one time, Over charge protection, Short circuit protection. Package included:1pcs 1to3 Charger + Instructions.