- [Voiceover] In order
to light the blue LED, I need to construct a battery
that generates more power. Whereas a 4-cell battery was
enough to light the red one, I needed to make a stronger
battery for my blue LED. So I made a battery made of six cells. So there are six sanded pennies, six soaked matte boards, and one intact penny on top. This battery generates over three volts, and so when I attach my blue LED, now it's powerful enough
to light the blue light.