car battery charge time

How to charge a car battery the best way

In Electric by Magnus Sellén1 Comment

Charging your car battery is good for your battery and it will, therefore, last longer. Many drivers only drive their cars for short distances, and this means that the car uses more energy from the battery than the alternator can produce. You may end up with an empty battery when you least expect it. The good news is that you can prevent this by using a car charger. I am a mechanic and I get a lot of questions about how you should charge your battery and if it is dangerous to charge it too often. In this article, I will give you the answers to the most common questions.

There are two different charging situations. Either you want to keep your battery charged, or you need to charge it quickly because your car won’t start. There are several larger chargers that allow you to start your car a few minutes after connecting the charger.

If you want to start your car really quickly, I can recommend a portable jump-starter. It will start your car within seconds and is really powerful for its size. If you want to check one out, you can do so here: DBPOWER Jump Starter Link to Amazon.

Remember that some cars can be damaged by any kind of jump starter and they should be used with caution. I have not experienced it myself after more than 500 jumpstarts on cars at work, but I have heard horror stories. The main reasons for this are voltage spikes and incorrect wiring.

The other situation is that you want to maintain your battery or charge the car following a drained battery. Here a car charger will do the work for you. A battery with a low charge dies much sooner than a battery that is constantly charged. Especially if you live in a cold country.

Get a good quality smart car charger!

A good, intelligent car charger is the first thing you should buy when you own a car. New car chargers are smart, and you don’t need much knowledge to charge your battery properly. The chargers use active monitoring to charge your battery in the most efficient way. You can have them connected around the clock if you want. When the battery is fully charged, they stop charging it. You can mount the charger on your vehicle and simply connect it at home to charge the battery continuously. You will greatly reduce the chance of a dead battery!

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There are a lot of affordable chargers available that will allow you to save money quickly instead of constantly buying new batteries (which are more expensive than a charger). You can get a good charger that does the job for you starting at $30. The type of car charger you should have depends heavily on the size of the battery in your car. But most normal size car chargers will do the job for all car batteries (12 volts).

One car charger that I can really recommend for universal use is the CTEK Battery Charger Link to Amazon.

ctek car charger

You can’t go wrong with this charger. It is protected against reverse polarity and you only have to plug it in and it will do all the work for you. It charges your car battery in 8 stages until it is fully charged.

Note that this car charger is 4.3A and it is a trickle charger. It will take some time to fully charge your battery. If you are looking for a charger that will start your car faster, you can look at the larger models like CTEK Battery Charger Link on Amazon. This is a professional tool that I use in my work as a mechanic to charge customer cars when they are in the workshop. It costs a bit more, but if you are looking for a quick charger, this is the charger you want.

How to charge your battery with these chargers

Charging with these chargers is really easy. First, you need to find your battery, it is most likely under your bonnet or at the bottom of the trunk. See the repair manual for further instructions. Note that some car models may have two batteries and they may not be connected together. Many times I have taken cars to garages that do not start even after they have said they have charged the battery. The problem is that they have charged the wrong battery. These cars usually use one battery for some electronics and one battery for the starting function in a car.

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Look for a “+” sign on the battery, connect the red terminal from the charger to it. Connect the black terminal to the “-” sign on the battery.

Connect the charger to the wall and follow the instructions for starting the charger.

Is it best to charge my battery slowly or quickly?

The slow charging of a car battery is best. A fast charge makes it less durable and may even damage the battery. Normally a rate of 4 amps, like the first charger I mentioned, is a good charge rate for all types of car batteries.

How long time does it take to charge an empty car battery?

How long it takes to charge an empty car battery depends on the size of the battery and the power of your car battery chargers. If you want to learn more about charging times, you should take a look at this article: How long time does it take to charge a dead car battery?

Do I have to fill up my battery first?

Yes, if you have an older battery, you should refill the battery before recharging. Most newer batteries are sealed and you cannot refill them. When the battery water runs out, you will need to buy a new battery.

If you have an older battery, you can remove the cover and check if you need to refill it. You should fill it with distilled water. Do not use normal tap water; it may work, but it may damage your battery.

Can I charge my battery connected to the vehicle?

Yes, you can charge it when it is connected to the battery if you have a modern car charger. Old car chargers can produce voltage spikes that can damage the electronics, but newer chargers do not.

I hope you enjoyed this short article about charging car batteries. If you would like me to tell you more about cars, you can look at my other articles on our homepage.

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What is your experience with car battery chargers? Please comment below!

Hello I'm Magnus, the owner and the writer of this website. I have been working with cars since I was 16 and I'm specialized with in-depth Automotive diagnostics. Also been driving drifting for the last 6 years. I'm here to give you answers to all your automotive questions and I hope that you enjoy our content.

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