10v 700ma 0.7a Universal Ac Dc Adapter Charger For Lego Mindstorms Ev3 Nxt 45517 Robot Power Supply For Lithium-ion Batteries - Pc Hardware Cables & Adapters - AliExpress
Amazon.com: Kircuit 10V AC/DC Adapter Replacement for Lego Education 45517 Mindstorms EV3 EV 3 9797 NXT9797 NXT 8547 NXT8547 45544 Set Chargeable Battery DC10V 600mA 700mA 10VDC 0.6A 0.7A Power Supply Charger : Musical Instruments