Current time: 0:00Total duration: 0:31

0 energy points

# Challenge: Design a more powerful battery

So now you know how to light a red LED. What about a blue one? Hint: a blue LED requires more power. Created by Exploratorium.

If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content
# Challenge: Design a more powerful battery

Current time: 0:00Total duration: 0:31

0 energy points

So now you know how to light a red LED. What about a blue one? Hint: a blue LED requires more power. Created by Exploratorium.