Batteries are something most of us use every day, but few of us really know much about where they come from. If you're a DIYer, the evolution of components is an important facet of understanding how they work, and over at Adafruit, they have taken the time to teach just that in a quick video.
Adafruit's Collin walks through the battery's beginning as a set of capacitors used to store voltage through its more modern usage as a container of cells where stored energy is converted into electricity. He then shows off how to build your voltaic pile using copper, zinc and salt water so you can better understand how it works.
It's a clever combination of history and practical knowledge, and if you've ever been curious about the history of the battery, it's a great starting point.
Collin's Lab History of the Battery [YouTube]