Gutter and lead–acid battery: what they have in common

1. Step 1. Gutter — is made of — Zinc. Galvanized steel.
2. Step 2. Zinc — is material for — Voltaic pile. The pile is discs of zinc.
3. Step 3. 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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