From the course: Electronics Foundations: Fundamentals

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Battery capacity

Battery capacity

From the course: Electronics Foundations: Fundamentals

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Battery capacity

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- Unfortunately, not all power sources last forever. Batteries use chemical reactions to generate a voltage between their terminals and push electrons through a circuit. But batteries have a physical limit to their size, which means there's a limit to the amount of energy they can store. Thinking of electrical power sources, with the analogy of electricity being like water, you can think of this faucet as being a power supply that's attached to a wall outlet. It will maintain a constant output pressure representing voltage, and it can provide me a practically endless supply of flowing water representing current. A battery on the other hand is more like this cooler of water. It has a finite amount of water that it can store representing electrical charge and gravity creates pressure at the base of it to push that water out. Now, when this cooler is fresh and full of water, like this one, that pressure at the base will…

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