Inner metal foil lining and gyroscope: what they have in common

1. Step 1. Inner metal foil lining — is part of — Leyden jar. Foil or water inside.
2. Step 2. Leyden jar — evolved into — Capacitor. The Leyden jar was the first capacitor.
3. Step 3. Capacitor — is part of — Implantable defibrillator. A discharge capacitor.
4. Step 4. Implantable defibrillator — has part — Lithium-ion battery. Power comes from a lithium battery.
5. Step 5. Lithium-ion battery — is part of — Segway. A battery.
6. Step 6. Segway — has part — Gyroscope. Gyroscopes.

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