How to Install Golf Cart Batteries: A Step-by-Step Guide

Power - by Joe Weber - updated on 5/16/2025

If your golf cart batteries are losing power or struggling to hold a charge, it might be time to replace them. This comprehensive guide will walk you through the process of installing replacement golf cart batteries, ensuring optimal performance and longevity.

Understanding Golf Cart Battery Type

Golf carts typically use deep-cycle batteries, available in 6-volt, 8-volt, or 12-volt options. The total voltage requirement depends on your cart's system:

• 36-volt systems: Usually require six 6-volt batteries.
• 48-volt systems: May use six 8-volt or four 12-volt batteries.

But it's not just about voltage—you also have a choice in battery chemistry, each with its own pros and cons:

• Flooded Lead Acid (FLA): The most common and affordable option. These batteries require regular maintenance, including checking water levels and cleaning terminals.
• Absorbent Glass Mat (AGM): A sealed lead acid battery that's maintenance-free and spill-proof. Offers faster charging and better vibration resistance than FLA.

• Lithium Iron Phosphate (LiFePO4): A premium option with a longer lifespan, lighter weight, faster charging, and no maintenance. While more expensive upfront, they offer significant long-term value.

  Lithium golf cart batteries are not available online at this time, but you can stop into one of our stores nationwide to order one for your golf cart.

Essential Tools and Safety Equipment

Before beginning the installation, gather the following tools and safety gear:

• Screwdrivers
• Wrenches or a socket set
• Battery terminal cleaner
• Wire brush or terminal brush
• Terminal protectors
• Protective gloves
• Safety glasses

How to Install Golf Cart Batteries Step by Step

Step 1: Power Off and Disconnect

• Ensure the golf cart is turned off and disconnected from any charging source.

Step 2: Access the Battery Compartment

• Most golf cart batteries are located under the seat. Remove the seat to access the battery compartment.

Step 3: Document Battery Configuration

• Take a photo or sketch the current battery layout and wiring to assist with reinstallation.

Step 4: Verify New Batteries

• Confirm that the new batteries match your golf cart model's required voltage and dimensions.

Step 5: Disconnect Old Batteries

• Start by disconnecting the negative (black) cable, followed by the positive (red) cable for each battery.

Step 6: Remove Battery Hold-Downs

• Carefully remove any brackets or straps securing the batteries in place.

Step 7: Remove Old Batteries

• Lift out the old batteries using a battery strap or handle, and place them in a safe area away from direct sunlight.

Step 8: Clean Battery Tray and Connectors

• Remove any debris from the battery tray. Clean the cable connectors with a wire brush and apply terminal cleaner to remove corrosion.

Step 9: Install New Batteries

• Place the new batteries into the compartment, aligning them according to your documented configuration.

Step 10: Secure Batteries

• Reattach the hold-down brackets or straps to keep the batteries firmly in place. Replace old, worn out ones with new battery hold-downs if the existing ones are rusty or damaged.

Step 11: Apply Terminal Protectors

• Place terminal protectors on each battery terminal to prevent future corrosion.

Step 12: Connect New Batteries

• Attach the cables to the batteries, connecting the positive terminals first, followed by the negative terminals.

Step 13: Charge the Batteries

• Fully charge the new batteries before using the golf cart to ensure maximum performance and lifespan.

Step 14: Recycle Old Batteries

• Return the old batteries to a recycling center or your battery retailer to dispose of them responsibly and possibly receive a core charge refund.

Installing Lithium Golf Cart Batteries: What's Different?

While most of the physical steps (disconnecting old batteries, cleaning terminals, connecting new ones) are similar, there are a few key differences to keep in mind:

1. Check for Compatibility

• Not all golf carts and chargers are designed for lithium batteries out of the box.
• You might need a lithium-compatible charger and possibly upgraded cables or a battery management system (BMS) depending on your setup.

2. Wiring May Be Simpler

• Lithium batteries often replace multiple lead-acid batteries with a single pack or fewer units.
• This can simplify the wiring slightly, but double-check the manufacturer's wiring instructions carefully. (Don't just mimic the old layout.)

3. Battery Mounting

• Lithium batteries are much lighter than lead-acid batteries.
• You may need to secure them with additional brackets or custom hold-downs because the original weight was part of what kept old batteries in place.

4. Charging Process

• Always use a charger designed for lithium batteries.
• A lead-acid charger can damage a lithium pack or cause dangerous overcharging.

5. Initial Setup

• Some lithium packs require a wake-up charge or activation step before first use, especially if they were stored in a "sleep" mode for safety during shipping.

Maintenance Tips for Extended Golf Cart Battery Life

• Regular Charging: Charge the batteries after each use to prevent deep discharges.
• Water Levels: Check and maintain proper water levels in lead-acid batteries.
• Clean Terminals: Inspect and clean battery terminals regularly to prevent corrosion.
• Proper Storage: Store the golf cart in a cool, dry place when not in use for extended periods.

Frequently Asked Questions About Golf Cart Battery Replacement

Q: How often should I replace golf cart batteries?

A: Most golf cart batteries last 4-6 years with proper care and regular charging.

Q: Can I mix old and new golf cart batteries?

A: No. Mixing batteries can cause uneven performance and shorten overall battery life.

Q: Where can I get golf cart batteries tested?

A: Stop by your local Batteries Plus for free battery testing and expert help finding the right replacements.

Need Help with Your Golf Cart Batteries?

Replacing your golf cart batteries is a manageable task that can significantly improve your cart's performance. By following this step-by-step guide and adhering to regular maintenance practices, you'll ensure a smooth ride and extend the lifespan of your batteries.

If your golf cart batteries are giving you grief, losing charge quickly, struggling with hills, or just not holding up like they used to, stop by your nearest Batteries Plus location. Our experts offer free battery testing to help diagnose the problem. And if it turns out you need new batteries, we'll help you find the best replacements to keep your golf cart running strong all season long.