Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. All About Car Battery Chargers

All About Car Battery Chargers

Car Battery Charger

Everyone has experienced a dead car battery from time to time. It’s common occurance, especially in winter, when batteries have to work even harder to get you to where you want to go. Fortunately, there’s a solution. A portable car battery charger can help you get moving if your battery is sluggish or dying, so you should always have one as part of your emergency kit.

Now, how do you use a car battery charger? It’s easy, as long as you have a bit of knowledge on your side.

Optimal charging

We hope that you’ll never have a dead car battery that needs charging, but if you do, make sure that you understand how your particular battery charger works. Read the instructions so you know exactly how to use it. Each battery charger is a little different, but generally speaking it simply involves connecting the clamps to the appropriate posts on the battery and then plugging the charger into your household outlet.

Connecting the charger

Once you know all the specifics of your car battery charger, it’s time to connect it to your car’s battery. You can do this with the battery inside or outside the vehicle – it doesn’t matter. Simply attach the positive clamp to the positive post on the battery, and the negative clamp to the negative post. The positive is red, and the negative is black, so all you have to do is match up the colors. You’ll have your dead car battery brought back to life in no time.

Now, set the amps and volts on the charger. If you want to charge the battery slowly, set a low amperage. This is actually the best way to charge your battery, but if you need to start your car quickly, you can use a higher amperage.

Charging

Now all you have to do is plug in your car battery charger and wait for it to reach the proper charge. Most chargers will shut off automatically when the battery is fully charged. Others may require that you check the dial on the charger periodically to ensure that you don’t overcharge the battery.

Unplugging the charger

Once your car battery has been fully charged, all you need to do is unplug the charger and disconnect the cables in the opposite order that you attached them. After that, you should be good to go.

If your battery is constantly losing its charge, that could be an indication that your battery is past its “best before” date. It could also indicate a problem in your car’s electrical system. In such cases, it’s best not to rely on the battery charger – have the problem checked out by a professional mechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...

Related questions

Q: Water was spilled in the trunk which soaked the car battery. Car won't start now. Does water destroy a car battery?

Hi, thanks for writing in about the concern with the BMW 320i. If the battery was submerged in water then it's completely possible for the battery to short out and die. Your friend will need to have the battery replaced....

Q: Q: Car won't start, even with jumpstart

Hello. It is likely that the car battery is the cause of why your car won't start. It is possible that the battery has bad cells which will prevent the car from starting, even when using jumper cables. The battery,...

Q: I have no ignition, or dash lights when turning key. All relays and battery are fine. Dash lights work when headlights are on.

You may have a bad connection in the connectors to the body control module, instrument cluster, and ECM. Try to disconnect the battery and disconnect these modules. Afterwards, apply dielectric lube to the connectors and reconnect the battery and see...