Posts Tagged: How many amps does a car need to keep it running?

The Truth About Charging Your Car Battery by Idling

Charging Your Car Battery By Idling Takes Much Longer Than You Think So you’ve jump-started your car, and intend to recharge your car battery by idling or driving around the block a few times. I’ve got news for you; it won’t work. It can take up to 4 hours to charge your car battery by idling. Here’s why it takes so long; there’s simply not enough extra power from the alternator to run all the electrical systems and still have enough left over for your battery. It takes 30-50 amps … Read More