why car batteries don’t die when we’re driving/fully started, but die when we leave a light on for a few hours

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Title, why can we drive for hours and hours on end, with headlights, radio, a/c, etc. (besides stopping for gas, bathroom breaks) But when we leave a light on for as much as an hour, the car battery will pretty much die instantly.

In: Engineering

12 Answers

Anonymous 0 Comments

When the motor is running the car battery is being constantly charged by the alternator which is run by a fan belt.

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