Caixa registradora e voltaic pile: o que têm em comum

1. Passo 1. Caixa registradora — evoluiu para — Self-checkout. A till.
2. Passo 2. Self-checkout — tem como parte — Touch layer (capacitive). A touchscreen.
3. Passo 3. Touch layer (capacitive) — faz parte de — Smartwatch. A touchscreen.
4. Passo 4. Smartwatch — tem como parte — Lithium-ion battery. Powered by a lithium-ion battery.
5. Passo 5. Lithium-ion battery — evoluiu de — Lead–acid battery. The lithium-ion battery is the next generation of rechargeable chemical current sources, with higher specific energy.
6. Passo 6. 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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