The power of Dave's World

With Christmas nearly upon us, and the need for AA & AAA batteries at a high, Dave Moore wanted to teach us a no-fuss way of filtering through the duds.

It couldn't be easier - "empty batteries bounce and flat batteries don't". He's a clever spark is our Dave.

He also tells us why hummingbirds are sooo sweet and has big news about the blue whale.

This is my own addition:

Check out Dave's facts in full by pressing the play button on screen.