Wallet e voltaic pile: o que têm em comum

1. Passo 1. Wallet — é feito de — Leather. Leather.
2. Passo 2. Leather — é material para — Submarine. It was covered with leather.
3. Passo 3. Submarine — tem como parte — Lead–acid battery. Underwater, electric motors run on batteries.
4. Passo 4. Lead–acid battery — evoluiu de — Voltaic pile. Planté’s battery developed the idea of a chemical current source by making it rechargeable.

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