Who to charge old golf cart batteries

If your golf cart battery isn’t holding a charge like it used to, it may be time to recharge or replace it. But before you spend money on a new battery, it’s worth trying to rejuvenate your old one. Charging an old golf cart battery can help restore its performance and extend its lifespan.

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First, it’s important to determine the type of battery you have and the optimal charging procedure. While all golf cart batteries are designed to store electrical energy, there are two main types: lead-acid and lithium ion. Lead-acid batteries are the most common type of golf cart battery and require a different charging process than lithium ion batteries.

Once you have identified your battery type and charging requirements, it’s time to gather the necessary equipment. You will need a charger, a voltmeter, and protective gear such as gloves and safety glasses. It’s also important to charge your battery in a well-ventilated area to avoid dangerous fumes.

Next, you should prepare your battery for charging by checking and cleaning the connections. Dirty or corroded terminals can impede the charging process and even damage your battery. Use a wire brush or sandpaper to remove any buildup on the terminals and cables.

With your battery prepared and your charger connected, you can begin the charging process. Monitor the voltage and temperature of the battery throughout the charging cycle to ensure that it is not overcharged or overheated. When the battery reaches the appropriate voltage, your charger should automatically switch to a trickle charge to maintain a full charge without overcharging.

By following these steps and conducting regular maintenance on your golf cart battery, you can help extend its life and improve its performance.

How to Charge Old Golf Cart Batteries

How to Charge Old Golf Cart Batteries

Step 1: Preparing the Batteries

Before charging old golf cart batteries, it’s important to clean them properly. Use a solution of baking soda and water to scrub off any dirt and grime on the surface of the batteries. Then, remove the caps from the battery cells and check the electrolyte levels. If the levels are low, add distilled water to top up the cells.

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Step 2: Choosing the Right Charger

When it comes to charging old golf cart batteries, you should use a charger specifically designed for deep-cycle batteries. A charger that’s too weak won’t charge the batteries fully, while a charger that’s too powerful can damage them. Look for a charger with a charge rate that matches the capacity of your batteries:

  • For 6V batteries, choose a charger with a maximum charge rate of 10% of the battery’s capacity.
  • For 8V batteries, choose a charger with a maximum charge rate of 15% of the battery’s capacity.
  • For 12V batteries, choose a charger with a maximum charge rate of 20% of the battery’s capacity.

Step 3: Connecting the Charger

Connect the charger’s red (positive) cable to the positive battery terminal, and the black (negative) cable to the negative battery terminal. Make sure the cables are securely connected, and avoid touching the metal parts with your bare hands.

Step 4: Charging the Batteries

Turn on the charger and let it do its job. Charging times will vary depending on the charger and battery capacity, but it’s recommended to charge the batteries until they reach a full charge. You can use a voltmeter to check the battery voltage; a fully charged battery should read around 12.6V.

Step 5: Disconnecting the Charger

Step 5: Disconnecting the Charger

When the batteries are fully charged, turn off the charger and disconnect the cables from the battery terminals. Be careful when removing the cables, and avoid touching them together or with other conductive objects.

By following these steps, you can safely and effectively charge old golf cart batteries and extend their lifespan. However, if your batteries are too old or damaged, it may be time to replace them.

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Check Battery Voltage

Why it’s important to check battery voltage

Before deciding to charge old golf cart batteries, it’s important to check their voltage. This is a simple procedure that can help you determine the current state of your batteries and whether they require charging or replacement.

If your batteries have a voltage reading below 10.5 volts, they are likely depleted and will need to be charged. On the other hand, if they have a voltage reading above 12.6 volts, they are likely overcharged and may need to be replaced.

How to check battery voltage

To check the voltage of your golf cart batteries, you’ll need a digital multimeter. First, turn off the golf cart and remove any cables connected to the batteries. Then, turn on the multimeter and set it to the DC volts setting.

Next, touch the red probe to the positive terminal of the battery and the black probe to the negative terminal. The voltage reading should display on the multimeter screen. Repeat this process for each battery in the golf cart.

If you’re unsure how to use a multimeter or don’t have one, you may want to consider having a professional technician check your batteries.

Prepare the Charger

Clean the connectors

Clean the connectors

Before charging the old golf cart batteries, it is essential to clean the connectors thoroughly. Dirt, grime, and corrosion can build up on the connections, which may affect the flow of electricity.

Use a wire brush or sandpaper to rub away any grime or corrosion on the connector terminals. After cleaning, you can apply a layer of petroleum jelly to the connectors to prevent corrosion in the future.

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Connect the charger

Connect the charger

Next, connect the charger to the old golf cart batteries. Ensure that you connect the terminals correctly to avoid short-circuiting. It’s recommended to start with the positive post of the battery and then connect the negative post. However, if you’re not sure, consult the battery manufacturer’s instructions.

Additionally, ensure that the charger is compatible with the voltage and amperage of the golf cart batteries. Using an unsuitable charger is not only dangerous but may also damage the batteries.

Choose the charging mode

Choose the charging mode

Finally, you need to choose the charging mode that suits the golf cart batteries. There are different charging modes, including pulse, trickle, and bulk charging. The recommended mode will depend on the battery’s state of charge and age.

Consult the battery manufacturer’s instructions to determine the most suitable charging mode for your specific batteries. Once you’ve chosen the charging mode, start the charging process and ensure that you monitor the progress closely.

Charging the Batteries


Before starting to charge the old golf cart batteries, make sure to prepare the area for safety reasons. The place should be well-ventilated to avoid the accumulation of hydrogen, an explosive gas produced during the charging process.

Next, check the battery terminals and make sure they are clean, free of corrosion and tightened properly. If there is any corrosion, remove it using a mixture of baking soda and water, and scrub with a wire brush.

Selecting the Charger

Selecting the Charger

Select a charger that is compatible with the old golf cart batteries. The charger should have enough power to handle the number of the batteries and type of the battery. Getting a charger with a higher amperage can shorten the charging time but can also result in overcharging, which can damage the batteries.

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Charging Process

  • Connect the charger to a power source and to the battery terminals.
  • Make sure the charger is turned off before starting the charging process.
  • Set the charger to the correct voltage setting for the batteries.
  • Turn on the charger and let it charge the batteries until the charger shuts off automatically.
  • Disconnect the charger from the power source and from the battery terminals.
  • Remove the batteries from the charger and let them cool down for at least 30 minutes before using.



Charging old golf cart batteries is a simple process if done properly. Regular charging can prolong the lifespan of the batteries and save the cost of buying new ones. Remember to follow the safety precautions and use a compatible charger for the best results.

Test the Batteries

Battery Tester

Using a battery tester is the easiest way to check the state of your old golf cart batteries. You can purchase a tester online or from a hardware store. It will provide you with the information you need to determine if your batteries need charging or if they require replacement.


Another method is to use a hydrometer to measure the specific gravity of the electrolyte in each cell of the battery. A fully charged battery will have a specific gravity of around 1.265. If the reading is below this, it indicates the battery needs charging. A reading below 1.225 may require replacement.

Load Tester

A load tester is used to measure the battery’s ability to deliver current while under load. This test will provide information on the battery’s capacity and its ability to perform under a heavy load. If the battery fails to deliver the required load, it may indicate that it needs charging or replacement.

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Visual Inspection

Visually inspect the batteries for any signs of damage, corrosion, or leaks. If there is any damage, this may cause the battery to short circuit or fail prematurely. Clean the terminals, ensure they are tight and free of corrosion.


Testing your old golf cart batteries is important before charging them – it will save you time and money in the long run. Use any of the above methods to determine your battery’s condition before deciding on whether to charge or replace them.


Can I charge old golf cart batteries?

Yes, you can charge old golf cart batteries, but keep in mind that their capacity may have diminished over time, so they may not hold a charge as well as new batteries.

How do I know if my old golf cart battery needs charging?

If your golf cart battery is not holding a charge and your cart is running slower than usual, it may be time to charge the battery. Also, if you notice a sulfur smell, it could be a sign that the battery is over-discharged and needs charging.

Can I use a regular car battery charger to charge my golf cart battery?

No, it is not recommended to use a regular car battery charger to charge your golf cart battery because the charging process is different for different types of batteries. A golf cart battery charger is designed to charge deep-cycle batteries like those in golf carts.

How long does it take to charge an old golf cart battery?

The charging time of an old golf cart battery depends on the type and age of the battery and the charger used. Generally, it can take anywhere from 4 to 8 hours to charge a battery fully.

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Can I charge a dead golf cart battery?

Yes, you can charge a dead golf cart battery, but it may take longer to charge, and it may not hold a charge as well as a battery that has not been fully discharged.

Why is my golf cart battery not holding a charge?

There are several reasons why a golf cart battery may not be holding a charge, including over-discharging, sulfation, low electrolyte levels, and corrosion. It is important to maintain your battery properly to extend its lifespan.

How often should I charge my golf cart batteries?

The frequency of charging your golf cart batteries depends on how often you use your cart. It is recommended to charge your batteries after each use to ensure they are always fully charged.




DIY Revive Golf Cart Battery Trojan T-105

DIY Revive Golf Cart Battery Trojan T-105 Автор: Rinoa’s Auspicious Travails 9 лет назад 10 минут 42 секунды 262 035 просмотров


William Lee

As an avid golfer and owner of an old golf cart, I found this article extremely helpful in understanding how to charge my old golf cart batteries properly. The step-by-step instructions were clear and concise, making the process seem much less daunting. I appreciate the tips on checking for signs of damage and ensuring proper ventilation while charging the batteries. This article has definitely saved me some frustration and potentially costly mistakes when it comes to maintaining my golf cart. I would highly recommend this article to any fellow golfers with old golf carts looking to prolong the life of their batteries. Thanks for the informative read!

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John Smith

As a golf cart enthusiast, I have often found myself in the predicament of dealing with old batteries that no longer hold a charge. This article on how to charge old golf cart batteries was a lifesaver for me. The step-by-step instructions were easy to follow, and I appreciate the writer providing different methods for charging the batteries depending on the circumstances. This article has helped me save money by giving me the knowledge to revive my old batteries instead of having to purchase new ones. I highly recommend this article to any fellow golf cart owners who are experiencing battery issues.

David Johnson

As someone who loves golf and enjoys taking rides on my old golf cart, keeping its batteries charged is crucial. The article provided clear and easy-to-understand steps for recharging old golf cart batteries. I appreciate the tips on using a multimeter to check the battery’s charge and the innovative suggestions for using solar panels to charge the batteries. Overall, this article was helpful and informative, and I look forward to implementing these tips to keep my old golf cart batteries charged and running smoothly!

James Brown

As an avid golfer and owner of an old golf cart, I found this article very informative. Charging old golf cart batteries can be a tricky task, and it’s important to have the right tools and knowledge to do it correctly. I appreciate the tips and instructions provided, especially the advice to properly maintain the batteries to extend their lifespan. It’s also helpful to know what signs to look for to determine if the batteries need to be replaced altogether. Overall, this article is a great resource for anyone who owns an older golf cart and wants to keep it running smoothly.

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Amanda Baker

As a golf cart owner, I found this article extremely helpful in learning how to properly charge my old batteries. It’s frustrating to invest in a new set of batteries every few years, so being able to extend their life through proper charging techniques is a game-changer. I appreciated the detailed instructions and safety tips provided in the article. It’s important to make sure you are following proper procedures when dealing with batteries, especially since they can be dangerous if mishandled. Overall, I would highly recommend this article to any fellow golf cart owners looking to save some money and extend the life of their batteries.

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