Some of the new EV3 rechargeable batteries have a circuit error and do not work properly. After you recharge one of these defective batteries, install it in the EV3, and turn on the EV3, you will see a brief red flash and then nothing. The problems is just with the battery, not the EV3 itself.
Below is the letter from LEGO Education explaining the problem and giving instructions for contacting them if you have a defective battery.
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Barbara teaches at the Shady Hill School in Cambridge, Massachusetts and works at the Center for Engineering and Education Outreach at Tufts University. She is the author of several LEGO robotics activity books for teachers, most recently STEM by Design.
Latest posts by Barbara Bratzel (see all)
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- Does LEGO BOOST Have a Place in Education? - 20 January 2018
- EV3 books - 4 July 2017