Theremin e lead–acid battery: o que têm em comum

1. Passo 1. Theremin — tem como parte — Oscillator. Beat-frequency oscillators.
2. Passo 2. Oscillator — faz parte de — Pacemaker. A pulse generator.
3. Passo 3. Pacemaker — tem como parte — Lithium-ion battery. A lithium battery (lithium–iodine).
4. Passo 4. 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.

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