Flywheel and voltaic pile: what they have in common

1. Step 1. Flywheel — is part of — Internal combustion engine. The flywheel smooths out the engine’s strokes.
2. Step 2. Internal combustion engine — has part — Starter motor. A starter.
3. Step 3. Starter motor — uses — Car battery. Power.
4. Step 4. Car battery — is a kind of — Lead–acid battery. Lead–acid.
5. Step 5. Lead–acid battery — evolved from — Voltaic pile. Planté’s battery developed the idea of a chemical current source by making it rechargeable.

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