The LEGO Mindstorms EV3 Rechargeable DC Battery is a key component for the MINDSTORMS EV3 set, featuring a plastic construction and designed for ages 5 and up. Made by LEGO in Denmark, this battery is specifically crafted for the EV3 character in the MINDSTORMS theme, catering to children with an interest in robots and providing them with a hands-on building experience. With its rechargeable design, the DC battery ensures that the EV3 robot can continue to run and create interactive experiences for young builders. Each battery comes with a uniquely numbered tamper proof sticker.