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How Long To Charge A Car Battery 

 October 5, 2021

By  Phil Borges

When Does a Car Battery Charge?

The next time you are stuck on the side of the road because your car battery died, it is good to know how long it will take for your car battery to charge. There are a few different ways that you can charge a car battery, but not all methods will be compatible with every type of vehicle. If you have an older model vehicle with no alternator or electronics then jump-starting may be an option for charging your dead battery and get yourself going again. But if you have a newer model vehicle with an electronic ignition system then jump-starting could cause more problems than it solves. For this reason, we recommend that modern vehicles use one of these three charging options: trickle charger, solar panel charger, or auto electrician wire-in charger.

The battery is only charged when the engine of your car is running. This can be a problem if you want to go on an extended road trip without recharging, but it's perfect for daily commutes and errands around town!

Do Car Batteries Charge While the Engine Is Idling?

It depends on what you mean by charge, and your definition of the word "idling" will depend on how quickly it's being given energy. If you have a car with an alternator that runs at 1000 rpm, then yes the battery is charging while the engine is idling. However, if you have a car with an alternator that runs at 500 rpm then no the battery isn't charging while idle; in fact, it would take 40 minutes to charge fully enough for just one mile of driving.

This myth came about because batteries stored in vehicles discharge from a few hours to nearly full before they are ever used. The only way for alternators that run at 1200-1500 rpm to recharge them from 10-50% level is for the engine to be running.

How Long Should I Idle my Car to Charge the Battery?

If your car is sitting in the driveway for weeks, should you let it idle to recharge its battery? Well some people argue that this wastes gas and time. Others say how important a fuel-powered engine is during these times of Coronavirus outbreaks when we are not driving as much due to restrictions imposed by public safety authorities. But what if you don’t have any other option but an idling car because there are no power lines or outlets nearby? Let's take one business owner who was struggling with his vehicle after being without electricity for days due to Hurricane Irma last year: "I had my truck rigged up so I could plug into 220 volts at home," he said."It would run all day long until night.

If you're looking for a quick fix, it's not going to happen. You might have the best intentions with your car battery but if there are so many other electrical systems in your vehicle siphoning away power from the alternator then what little is left over will charge up very slowly and only intermittently when at idle or sitting still. The amount of voltage coming out of an engine system can also affect how much energy goes into charging up that dead battery too - which means more time wasted by letting a car run impassively on its own while idling unnecessarily for hours until all those other circuits get their fill first!

When you let your engine idle, it may charge a small amount of battery power but that is not the most efficient way to boost voltage. One study found an estimated 15 minutes worth of idling will cost more energy than what's gained from charging the battery and starting up again! 

It would be better to turn off your car completely or go for a drive instead - even if just around town in order to get out and clear one's head. In case your car will be parked for a while, you should turn on the trickle charge function to keep it from going dead. Batteries are expensive and hard to replace so keeping them in good condition is crucial!

How Does A Car Charge a Battery?

The power in your car starts with the alternator. The alternator's connected to the crankshaft of the engine via a belt, which turns when you turn on your ignition and it spins this rotor that has magnets around it inside there. And as these magnets spin by they create an AC current (alternating electric/magnetic fields) so then it gets converted into DC current for all those electrical components including headlights, dashboard lights ... everything! Then finally charges up our battery so we can use electricity again some other time

It all sounds complicated at first but think about how many things happen just in order to keep us driving forward: from turning over the engine crank shaft spinning belts powering generators creating alternating currents converting them right back into direct currents so we can have a full tank of gas!

How long does it take a car battery to charge while driving?

You might be wondering how long you must drive your car for it to charge. According to the general consensus, 30 minutes will not provide enough power but if there are other factors such as temperature or age of battery then this may have an effect on charging time.

If you've been neglecting your car battery, then it could very well be dead. But don't panic! If driving around for a little while doesn’t work to charge the battery back up again, there is still hope as long as you're not too far from home or somewhere with an available charger (such as at Walmart). However if that's not an option and the situation feels hopeless, all might not yet be lost! You can always consider getting in touch with us here at CarCareNow who offer services such as emergency roadside assistance where we'll come out to wherever you are and provide on-site power solutions so that even when your vehicle won’t start due to no fault of yours - our experts will get

We hope that this article has helped you understand the complexities of a car battery and how it plays into your vehicle’s electrical system. If not, don't worry! There are plenty of other resources available on our website to help answer any questions or concerns you might have about batteries and charging in general. One good resource "How To Recondition Your Car Battery" which you can watch below. Let us know if there's anything else we can do for you!


About the author

Hi, I'm Phil Borges.. thanks for reading.. My wife says I can't shut up about batteries so to save my marriage I've started this blog .. where I'd be ranting about batteries! Please leave a comment if you have any questions, I'm happy to help!

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