Sports car and lead–acid battery: what they have in common

1. Step 1. Sports car — has part — Car brake. Brakes.
2. Step 2. Car brake — is part of — Electric car. Besides regeneration, ordinary friction brakes are needed.
3. Step 3. Electric car — has part — Inverter. An inverter powers the traction motor.
4. Step 4. Inverter — is part of — Uninterruptible power supply. An inverter.
5. Step 5. Uninterruptible power supply — has part — Lead–acid battery. A battery.

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