How much charge can a car get after running for twenty minutes?

1 Answers
VanCalvin
07/29/25 11:27pm
Idling for 20 minutes can charge the battery by about 8%. Generally, the generator speed during idling is 1500 rpm, and running at 1500 rpm for 20 minutes can provide enough power to start the engine once. If conditions permit and the car needs charging, it is recommended to use a battery charger to charge the car battery. Below is an introduction to car batteries: 1. Introduction one: The capacity of a car battery is 60Ah, and the charging current during engine idling is 30A. The theoretical time required to fully charge the battery is 3 hours. 2. Introduction two: For vehicles parked for long periods, charge the battery once every month, preferably for at least one hour each time. Regularly clean the accumulated dirt on the battery surface and the oxides on the positive and negative terminals. Be careful not to short-circuit the positive terminal to ground during cleaning.
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