Assertion: alternator | /r/CapableOf | keep the voltage
Facets:
value: to the car's battery
type: TRANSITIVE-OBJECT
Source sentences:
text: If the voltage starts to fall below the target voltage (approximately 13.8 volts depending on the alternator's design), the alternator produces more current to keep the voltage up.
text: An engine's alternator maintains the voltage to the car's battery, which powers the lights, heater and other accessories.