Rare to find, highly desirable ev3 rechargeable battery
Also, LEGO MINDSTORMS Education EV3 Core Set is available to order on education.lego.com for $411.95
The system includes the EV3 Intelligent Brick, a compact and powerful programmable computer that makes it possible to control motors and collect sensor feedback using the intuitive icon-based programming and data logging software that is delivered with the set.
The set is delivered in a sturdy storage bin with a sorting tray, three Servo Motors, five Sensors (Gyro, Ultrasonic, Color and 2x Touch), a EV3 Rechargeable DC Battery
, connecting cables, and building instructions.
Temporarily Out of Stock will ship 2/12/2018.
(if the link gets redirected to shop.lego.com, need to change to education.lego.com manually, try copy n paste above or just search 5003400 on their education site)
Lastly, here is a comparison btw 45544 and 31313