Pipe organ et voltaic pile : ce qu'ils ont en commun

1. Étape 1. Pipe organ — a pour partie — Keyboard. Manuals were the first keyboards.
2. Étape 2. Keyboard — fait partie de — Laptop. The keyboard is built into the laptop's case.
3. Étape 3. Laptop — a pour partie — Lithium-ion battery. A battery.
4. Étape 4. Lithium-ion battery — a évolué de — Lead–acid battery. The lithium-ion battery is the next generation of rechargeable chemical current sources, with higher specific energy.
5. Étape 5. Lead–acid battery — a évolué de — Voltaic pile. Planté’s battery developed the idea of a chemical current source by making it rechargeable.

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