Saturn V and lead–acid battery: what they have in common

1. Step 1. Saturn V — uses — Hydrogen. Hydrogen stages.
2. Step 2. Hydrogen — uses — Electrolysis. Hydrogen is produced by electrolysis of water.
3. Step 3. Electrolysis — evolved from — Voltaic pile. The first electrolysis of water was powered by a voltaic pile.
4. Step 4. Voltaic pile — evolved into — Lead–acid battery. Planté’s battery developed the idea of a chemical current source by making it rechargeable.

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