50PCS 10V 700mA 0.7A Universal AC DC Adapter Charger US plug For Lego Mindstorms EV3 NXT 45517 Robot Power Supply
Amazon.com: PK Power AC DC Adapter for Lego Mindstorms EV3 Intelligent Brick Rechargeable DC Battery 45501 Class 2 Power Supply Cord Cable PS Wall Home Battery Charger Mains PSU : Electronics