How To Use Car Battery Charger At Home? [2023]

car battery charger

We may earn a commission from purchases made through our recommended product links. Prices can change over time but were accurate at the time of publication.

Driving your car regularly can ensure that your car battery does not die and does not have to be charged manually. However, if you live in a place with extreme temperatures or do not drive your car often, you might need to charge your battery manually.

best car battery charger 12v
best car battery charger 12v

In the realm of the automobile industry, a car battery charger is a crucial element. A good battery charger ensures smooth ignition, optimal vehicle performance, and seamless working of all the smart gadgets. With innumerable options of car battery chargers available, selecting the right car battery charger can be a daunting task.

If you are looking for a car battery charger for your vehicle, here is a complete guide to choose the correct option for your vehicle.

Read – How To Use Facebook Marketplace To Buy Car Battery? [2023]

How To Setup Car Battery Charger? [Guide]

Here is a step-by-step guide to setting up a car battery charger for your completely dead batteries:

How To Setup Car Battery Charger
How To Setup Car Battery Charger?
  1. Select a suitable location: To recharge depleted batteries, place your battery charger on a flat surface near an electrical outlet so that the battery terminals are easily accessible.
  2. Go Through the Manual: Certain chargers have specific instructions and features regarding battery types, so reading a manual is a must. Do go through the safety instructions as well.
  3. Turn Off Your Car and Identify Battery Terminals: To prevent any electrical interference, turn off the ignition and locate the positive (+) and negative (-) battery terminals on the car battery.
  4. Connect the Charger Cables and Set the Charger Settings: Connect the positive cable from the battery charger to the positive terminal of the battery and the negative cable from the charger to a solid, unpainted metal part of the frame of the vehicle or the engine block called the grounding point. Now, go through the manual to select the appropriate settings for your battery type and condition.
  5. Plug in and turn on the Charger: Turn off the battery charger and plug the charger into a standard electric outlet. Once connected, switch on the charger and select the appropriate charging mode.
  6. Continuous Monitoring of Charging: Monitor the battery status and keep an eye on the indicator lights so that you can take action immediately if something goes wrong. 
  7. Completion of Charging: Turn off the charger once the process is complete, and disconnect the cables. Disconnect the negative cable before the positive cable to reduce the risk of sparking.
  8. If you have removed any kind of cover from the battery, replace the battery with a better cover and fasten it securely.
Pro-Tip: Before connecting a car battery charger with the battery of your vehicle, ensure that the charger is turned off, and unplugged from the power source. Connect the positive (red) clamp of the car battery charger before connecting the negative (black) clamp to prevent a short circuit.

Problem Solved – 10 Best Dead Car Battery Tricks That Work

Types Of Car Battery Chargers

To give a boost to your car before you hit the road, here are 10 basic types of car battery chargers that can help you during trouble with your car battery:

  • Portable Car Battery Chargers: A portable car battery charger is a compact device that provides an external power source to charge the battery of a vehicle. This car battery charger comes with charging cables, clamps, USB ports, and built-in air compressors.
  • Trickle Chargers: Trickle chargers provide a slow and steady charge to the battery. A trickle charger will prevent overcharging by delivering a low current and maintaining the health of a battery.
  • Float Charger: A float charger maintains the charge of the battery by delivering a consistent, stable voltage to a fully charged battery. Use it when your battery needs to remain connected for longer periods at an optimal charge level.
  • Automatic Smart Battery Charger: The automatic car battery charger monitors the battery’s condition, adjusts the charging process, and prevents overcharging by studying factors like temperature, voltage, and state of charge.
  • Desulfating Chargers: At certain times, you might find sulfate deposits on a battery. These chargers break down sulfate crystals on the battery plate, extending old batteries’ life.
  • Jump Starter: A jump starter includes charging capabilities that can recharge a battery while also being ready to jump-start another vehicle if needed.
  • Fast Chargers: If you want your vehicle to hit the road as soon as possible, fast chargers are the best. However, one must be careful as these can overcharge batteries very quickly.
  • Solar Battery Chargers: For maintaining batteries in vehicles that are not regularly used, opt for a solar battery charger. The solar panel converts sunlight into electricity to charge a battery. Although these battery chargers are slow, they are ideal for maintaining a consistent charge.
  • Manual Chargers: These old-school chargers need to be monitored by you during the charging process and get disconnected once the battery is fully charged. They are not automated chargers and require attention.
  • Electric Car Battery Charger: These car battery chargers are the fastest and one of the most common car battery chargers. They give a super-fast power-up and will put out anywhere from 1 to 50 amps of electricity.

Select a car battery charger that is compatible with your battery type (standard lead-acid, AGM, gel). Ensure compatibility with your battery chargers to prevent damage, and opt for a fully automatic battery charger for maximum convenience, power, and safety.

Must Read – How To Install Top Post Battery Terminal In 2023 [Guide]

How To Choose a Car Battery Charger?

Some of the key factors to consider when deciding which car battery must be chosen when making this decision:

How To Choose a Car Battery Charger
How To Choose a Car Battery Charger?
  • Battery Type and Compatibility: Once you have determined the type of battery for your vehicle, the options available are lead-acid (flooded, AGM batteries, or gel cell batteries) battery, lithium-ion battery, lead acid batteries and many more. Go through your vehicle’s manual to determine which is the best. Also, make sure that the battery matches the voltage requirements of the vehicle.
  • Battery Size and Fitment: Make sure that the battery fits within the vehicle’s battery compartment. Ensure that the terminal placement aligns with the wiring configuration of the vehicle.
  • Cold Cranking Amps (CCA) and Starting Performance: CCA measures the ability of the vehicle to start in cold weather. The CCA rating of the battery must either meet or exceed the vehicle manufacturer’s recommendations. This will guarantee a reliable start even in frigid conditions.
  • Reserve Capacity for Electronics Support: The Reserve Capacity of a vehicle indicates how long it can power your vehicle’s electronics in the event of an alternator failure. A battery with a higher RC will work in cases where there are numerous electronic devices or add-ons. This will ensure that they function continuously, even during brief power interruptions.
  • Warranty Coverage: Always select batteries that come with an extended warranty period. The battery’s warranty will reflect the manufacturer’s confidence in its durability.
  • Electric Load of Vehicles: If your vehicle is equipped with electronic devices like infotainment systems, GPS, or any other smart accessory, select a battery that can accommodate an increased electrical load. Make sure that it can meet the power demands without any extra strain.
  • Climate Conditions: Weather can affect the performance of a battery. While a battery tends to degrade faster in warm climates, colder regions demand higher CCA ratings. Make sure that you consider the climatic conditions before buying a battery to enhance its effectiveness.

Choose a car battery charger with sufficient voltage and amperage according to the size of the battery of your vehicle. Look for safety features like overcharge protection and read reviews to choose a reputable brand so that you are aware of the best car battery chargers.

“As for the safety of fast car battery charging, it can be safe if done correctly. However, it’s essential to use a charger specifically designed for fast charging and follow the manufacturer’s guidelines closely. Fast charging generates more heat, so always monitor the process and be prepared to stop if you notice any issues.”

Ryan Waterman
CEO, Independence Automotive

How To Locate Your Car Battery?

Whether the car battery is located under the hood or the boot depends on the make of the car. To locate the car battery, follow the steps below:

How To Locate Your Car Battery
How To Locate Your Car Battery?

Under The Hood

  • Pop open the hood of the car and locate the engine compartment, which is the space where the engine is housed.
  • The battery is usually placed in a rectangular or a square-shaped metal or plastic box often black in color. Car batteries are most of the time placed right at the front, near the engine.

Car Boot

  • Open the trunk of your car and remove the covering, if any. Since cars have a spare tire in the boot, make sure that you remove that as well. Look for a rectangular or a square box for the battery.
  • Once you have located the box, look for battery terminals as an indicator to figure out the positive and negative terminals. Since every car is different, refer to the manual for specific instructions.


Frequently Asked Questions about car battery charger.

How Long Should You Charge a Car Battery?

Depending on the condition of the battery and the charger’s output, it should typically take 4 to 24 hours. Overcharging automotive batteries must be avoided at all costs.

How Long Does It Take to Charge a Car Battery?

Charging a battery fully with an amp of 4-8 amperes will take 10-24 hours. To boost a battery enough to start an engine, it will take 2-4 hours.

Is it safe to use a car battery charger at home?

Yes. While using a car battery charger at home, ensure enough ventilation around the charger attached and go through the manual carefully for safety precautions.

Which terminal do you put on first on a car battery?

The positive terminal is supposed to be put on first on a car battery, followed by the negative.

How can I charge my dead battery at home?

Dead batteries can be charged at home by connecting them to a compatible battery charger, following the charger’s instructions, ensuring proper ventilation, and preventing the smart charger from overcharging, as it can harm the battery life.


Remember that car battery chargers vary; therefore, buy the best battery charger for your vehicle, go through the manual, and follow the instructions properly to maintain good battery health. While changing car battery chargers, wear battery-safe gear, and remove, charge, and place it back must be done carefully. Always keep an extra portable car battery charger while traveling.

If you feel unsure about any step while fixing your vehicle’s battery, seek professional help immediately. Let us know if you have anything more to add in the comments section, and help us make it better for a person to change a car battery at home conveniently.

My top priority is to assist you in discovering the best products and maximizing the potential of the ones you currently own. Our team of experts is constantly testing new batteries, automotive equipment, and other items to help you complete more tasks, shop for top-notch products, and overcome any challenges that may arise.

Follow Mount Shine on Twitter, LinkedIn, and YouTube for the latest deals, product reviews, and more. Become part of Mount Shine’s Tribe! (#JoinOurTribe)

Originally posted 2023-10-26 21:55:39.

How To Use Car Battery Charger At Home? [2023]
How To Use Car Battery Charger At Home? [2023]

Kudrat Sandhu
Kudrat Sandhu

Kudrat is a skilled content writer at Mount Shine, specializing in assisting everyday consumers with automobile guides and choosing the best auto parts.

We will be happy to hear your thoughts

Leave a reply

Join Our Tribe!
Mount Shine
Compare items
  • Total (0)
Shopping cart