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Will Car Battery Charge At Idle. As others have said idling will charge your battery but keep in mind that youre also discharging a lot of energy just to start it. If the alternator does charge the battery when the car is sitting idle is it better to sit in the car and step on the gas pedal so that it charges faster.
Will Your Car Battery Recharge Itself Drive Cave from drivecave.com
Measure the voltage with the engine off. However the question is will letting it idle for 20 minutes put more charge in the battery than was removed by starting it. Again assuming that the battery can still hold a charge.
Factors Affecting a Car Battery Charging Time Several factors determine the time duration to recharge a dead car battery.
Starting a car draws 100 to 300 amps to start a car and idling a car for 15-20 minutes will only replace 3-4 amps the car battery never gets fully charged. Then have someone start the car and observe the meter. The car used in the 60s century was featuring a too weak DC Generator which could not successfully recharge the battery when the engine is at an idle stage. Will a car battery charge idle.
