Golf cart batteries normally have a life span of 4 to 6 years for flooded lead acid, 4 to 7 years for AGM, and 8 to 12 years for lithium (LiFePO4) battery types. Under improper charging practices, high temperature conditions, or neglecting to water your batteries, a lead acid system may only last 2 to 3 years, whereas lithium batteries with proper care can operate more than ten years.
This is basically the answer to how long do golf cart batteries last, although it is dependent upon many factors. Factors include how much you use your golf cart and how well maintained your golf cart batteries are. This article will detail the battery lifespans of different golf cart batteries, what causes battery degradation, indications of failing batteries, a voltage chart to test your batteries, and how to prolong their lifespan.
The Short Version
| Question | Answer |
|---|---|
| Flooded lead-acid lifespan | About 4 to 6 years with good care, often 2 to 3 years with poor care |
| AGM lifespan | About 4 to 7 years |
| Lithium (LiFePO4) lifespan | About 8 to 12 years, sometimes longer |
| Charge cycles | Roughly 500 to 1,200 for lead-acid, and 2,000 to 5,000 or more for lithium |
| Range per charge | Often 15 to 25 miles for lead-acid, and 25 to 40 miles or more for lithium, depending on the pack |
| Charging time | About 8 to 10 hours for lead-acid, and roughly 3 to 6 hours for lithium |
| Replacement cost | Roughly $700 to $1,700 for a lead-acid set, and $1,800 to $4,500 for lithium |
| Biggest lifespan killers | Heat, deep discharges, low water, undercharging, and sitting uncharged in storage |
How Long Each Type of Golf Cart Battery Lasts
Electric golf carts usually utilize one of the three battery types. It is the type of batteries used in the golf cart that largely determines their lifespan.
| What to compare | Flooded lead-acid | AGM (sealed lead-acid) | Lithium (LiFePO4) |
|---|---|---|---|
| Typical lifespan | 4 to 6 years | 4 to 7 years | 8 to 12 years |
| Charge cycles | About 500 to 1,200 | About 500 to 1,000 | About 2,000 to 5,000 or more |
| Maintenance | Regular watering, cleaning and equalizing | No watering, but still needs proper charging | Almost none, with a built-in battery management system |
| Charging time | 8 to 10 hours | 6 to 10 hours | 3 to 6 hours |
| Weight of a full pack | Heavy, often 300 pounds or more | Heavy | Much lighter, often around 100 to 150 pounds |
| Upfront cost | The cheapest | In the middle | The most expensive |
| Best for | Owners who do not mind routine maintenance | Owners who want lead-acid pricing without watering | Owners keeping the cart for many years |
Flooded Lead-Acid Batteries
These are the standard golf cart batteries used by most old carts and even some new carts. They are very affordable and reliable batteries but require proper maintenance. Consistent water levels, charging the battery after each use, and not deeply discharging the battery are the things that will determine if the batteries last for six years or only three.
AGM Batteries
AGM batteries are sealed lead acid batteries that do not require water topping up. These batteries perform well under vibration and they do not leak, but they are very sensitive to overcharging and thus should have a correct charger setting, Their lifespan is similar to a well-maintained flooded set.
Lithium Batteries
The lithium iron phosphate (LiFePO4) batteries have gained popularity as an upgraded option. They have a greater lifespan, weigh considerably less, recharge faster, and maintain consistent speeds when discharging their charge. A built-in battery management system prevents them from overcharging or undercharging, eliminating many errors that reduce the lifespan of the lead acid.
Years vs Charge Cycles: How Your Usage Changes Lifespan
Battery life has two definitions. The number of discharges and charges until a battery loses most of its storage capacity defines its cycle life, while its calendar life measures its lifespan in years, even if it’s hardly used, due to the aging of the chemicals used within.
The calendar life becomes the determining factor for the lifetime of the lead-acid battery pack in the case of a recreational golfer, who rarely depletes all his cycles. In the case of a neighborhood car driver or a golf cart fleet, the cycle life becomes exhausted first.
| How the cart is used | Flooded lead-acid | Lithium |
|---|---|---|
| A few times a month | Often 4 to 6 years, limited more by age and storage than by use | Often 10 years or more |
| A few times a week | Usually 4 to 5 years with good charging and watering | Usually 8 to 12 years |
| Every day around a community | Often 3 to 4 years | Often 7 to 10 years |
| Several rounds a day in a course fleet | Often 2 to 3 years | Often 5 to 8 years |
What Shortens Golf Cart Battery Life
Batteries rarely fail from old age alone. Most wear out early because of a handful of common problems.
| Cause | What happens | How to avoid it |
|---|---|---|
| Heat | Lead-acid battery life roughly halves for every 18 degrees F of temperature above about 77 degrees F | Park in the shade or a cool garage, and keep batteries out of direct sun during storage |
| Deep discharges | Regularly running lead-acid batteries close to empty wears the plates much faster | Recharge before the pack gets very low, and avoid draining below about 20 percent |
| Undercharging | Sulfate crystals build up on lead plates and permanently reduce capacity | Let the charger finish a full cycle every time |
| Low water levels | Exposed plates in flooded batteries get damaged and lose capacity for good | Check water monthly, and more often in hot weather |
| Overwatering | Electrolyte overflows during charging, causing corrosion and weaker acid | Top up after charging, to about 1/8 inch below the bottom of the fill well |
| Sitting uncharged in storage | Lead-acid batteries lose charge every month and can sulfate or even freeze | Store fully charged and top up the charge regularly |
| Loose or corroded terminals | Poor connections cause heat, voltage drop and uneven charging | Clean terminals and check cable tightness a few times a year |
| Mixing old and new batteries | A new battery gets dragged down by the older ones in the pack | Replace lead-acid batteries as a full set |
Signs Your Golf Cart Batteries Are Dying
Golf cart batteries normally fade over time and not die suddenly overnight. Be on the lookout for the following symptoms.
A frequent symptom is reduced mileage. If a golf cart that could do two rounds now takes difficulty in finishing one round, then the batteries are deteriorating. Difficulty accelerating and poor hill climbing ability is yet another symptom since the depleted batteries cannot supply more power.
Charging difficulties are another symptom. An unusually lengthy charging period, charging for extended periods of time without stopping, or the inability to charge can be a clear indicator of deteriorated batteries. In relation to the batteries, symptoms include swelled and cracked battery casing, leaking electrolyte, corrosion in the terminals, and rotten egg smell while charging.
Lastly, one bad battery can affect the performance of the entire set of batteries. A battery with lower voltage than the others after charging is a symptom that the battery set needs inspection.
How to Test Your Golf Cart Batteries
You can test the status of your lead acid pack at home using the digital voltmeter. For an accurate result, make sure that your batteries are charged fully and disconnect the charger and leave the cart idle for at least 6 hours, preferably 24 hours. Then take the readings of the voltage in each battery and the pack as a whole.
The following is an indication of the state of charge of your flooded lead-acid battery by their resting voltage. In this case, 36 volts in the pack means six 6 volts batteries, while 48 volts in the pack means eight 6 volt batteries.
| Charge level | 6V battery | 8V battery | 12V battery | 36V pack | 48V pack |
|---|---|---|---|---|---|
| 100% | 6.37V | 8.49V | 12.73V | 38.2V | 51.0V |
| 80% | 6.25V | 8.33V | 12.50V | 37.5V | 50.0V |
| 60% | 6.12V | 8.16V | 12.24V | 36.7V | 49.0V |
| 50% | 6.05V | 8.07V | 12.10V | 36.3V | 48.4V |
| 40% | 5.98V | 7.97V | 11.96V | 35.9V | 47.8V |
| 20% | 5.83V | 7.77V | 11.66V | 35.0V | 46.6V |
If the batteries do not read up to 100% after charging and resting, then they have lost capacity. Also, check the individual batteries within the battery pack. A variance of more than around 0.15 volts for 6-volt batteries within one pack means there is something wrong with the batteries. For wet/flooded batteries, the use of a hydrometer will give a better indication and the fully charged cell should have a specific gravity of 1.277.
For lithium battery packs, there is no need to take readings using a voltmeter since their voltage remains steady until the batteries are depleted. State of charge and health for most lithium batteries can be seen from the display or through the phone app connected to the battery management system.
How to Make Golf Cart Batteries Last Longer
Good habits can add years to a battery pack, especially with lead-acid. These are the ones that matter most.
Charge After Every Use
For lead acid batteries, plug in the golf cart after every use and let the battery fully charge up. The life span of lead acid batteries is maximized when they remain at near-full charge levels. Lithium batteries are not that sensitive and don’t require recharging after every trip.
Avoid Running the Pack Down to Empty
Deep discharging is detrimental to lead acid batteries. Don’t discharge your battery more than 20% if you can help it. Lithium batteries have higher tolerance for deep discharges, but the management system won’t allow the battery to go dead anyway.
Water Flooded Batteries Correctly
Check water level approximately once a month and more frequently during hotter seasons and high usage. Only distilled water should be used. Water is to be added after charging to a point of about 1/8 inch from the bottom of the fill well; however, in case of exposed plates, you can add water even before charging.
Keep the Batteries and Terminals Clean
Dirt, spillage of acid and corrosion may discharge your battery and make bad connections. To clean the top and the terminals, use a solution of baking soda and water. Make sure that all the cables are securely connected, is tight.
Equalize Flooded Batteries When Needed
Equalizing charging is an overcharging process used to bring the cells into balance and to reduce sulfate crystals on the plates of flooded lead acid batteries. This should be done in cases where there are inconsistent readings in the batteries after being fully charged, using a charger with an equalize option. Never equalize AGM or lithium batteries.
Use the Right Charger
Match your charger to the battery that you are charging as a lead-acid charger will destroy your lithium battery. Wrong setting may also overcharge your AGM battery. However, most of the current automatic chargers can be kept plugged-in.
Protect Batteries From Heat and Cold
Heat is the main nemesis of lead-acid batteries, so parking in the shade and storing your golf cart in a cool environment is very important. In winter, a fully charged lead-acid battery is much more resistant to freezing compared to an uncharged battery. Li batteries should not be charged at below-freezing temperatures without heating capabilities.
How to Store Golf Cart Batteries Over Winter
Storage is the area where most batteries suffer damage. If a cart remains idle in storage for months, the next time the cart emerges from storage, the battery will be dead.
For lead acid batteries, it is necessary to ensure that the battery is fully charged before storage, top up water levels, and ensure the battery tops are clean. For storage, keep the cart in a cool and dry place, not under direct heat. Lead acid batteries will discharge about 5% to 15% every month. Therefore, ensure that you charge your batteries monthly or whenever they go below 70%. Most cart owners switch off the cart’s run or tow switch to tow position to minimize power loss or use a charging unit meant for batteries in storage.
For lithium batteries, observe the manufacturer’s storage instructions. Most of them prefer that you store the batteries partially charged, turn the battery off or use the storage function, and test the charge after some months.
Lead-Acid vs Lithium: Which Lasts Longer for the Money
Lithium batteries cost more upfront, but they often work out cheaper over the life of the cart because you replace them less often. Here is a rough 10-year comparison for a typical 48-volt cart.
| Over about 10 years | Flooded lead-acid | Lithium |
|---|---|---|
| Number of battery sets | Usually two, sometimes three | Usually one |
| Battery spending | Roughly $1,500 to $3,500 in total | Roughly $1,800 to $4,500 in total |
| Ongoing costs | Distilled water, cleaning supplies and more of your time | Very little |
| Performance over time | Range and speed slowly drop as the pack ages | Steady power until the pack is near the end of its life |
| Best value if | You only keep the cart a few years or use it lightly | You plan to keep the cart for many years or drive it often |
If you are converting from lead-acid to lithium, the job often needs a compatible charger and sometimes other small changes, so budget for the full conversion, not just the battery.
How Much It Costs to Replace Golf Cart Batteries
Replacement cost is dependent on the voltage in your cart, the number of batteries your cart utilizes, the type of battery, and who will install the batteries (whether a professional shop). A general estimation is that the installation cost of a fully-charged flooded lead acid battery pack is usually $700-$1,700 while that of a lithium pack is usually $1,800-$4,500.
The voltages used in golf carts include either the 36-volt system which utilizes six 6-volt batteries or the 48-volt system which can be made up of either six 8-volt batteries, eight 6-volt batteries, or four 12-volt batteries. Check your cart’s battery type and number before purchasing.
Final Take
So, how long do golf cart batteries last? Flooded lead-acid will last somewhere between 4 and 6 years, AGM from 4 to 7 years, and lithium from 8 to 12 years. It depends on your battery care practices, temperature and many other factors, but those will give you an idea of the average. Batteries should be charged every time after their use, watered, not heated and never discharged completely. In case you have plans to enjoy your cart for a long period of time, you would get back the cost of lithium batteries.
Frequently Asked Questions
How long do lithium golf cart batteries last?
Lithium golf cart batteries usually last about 8 to 12 years, and many are rated for 2,000 to 5,000 or more charge cycles. With good care, some packs keep working well beyond that.
How long do lead-acid golf cart batteries last?
Flooded lead-acid golf cart batteries typically last about 4 to 6 years with regular watering and proper charging. With poor maintenance or heavy use, they can wear out in 2 to 3 years.
How many miles does a golf cart battery last on one charge?
Most lead-acid golf carts travel about 15 to 25 miles on a full charge, while lithium carts often go 25 to 40 miles or more. Hills, passenger weight, speed, tire pressure and battery age all change the range.
How often should you water golf cart batteries?
Check flooded golf cart batteries about once a month, and more often in hot weather or with heavy use. Top up with distilled water after charging, to about 1/8 inch below the bottom of the fill well.
Can you replace just one golf cart battery?
Replacing just one battery is only a good idea if the rest of the pack is fairly new, usually under a year old. In an older pack, a new battery gets worn down by the others, so replacing the whole set is the better choice.
Should you leave your golf cart plugged in all the time?
Many modern automatic chargers are designed to stay connected and switch to maintenance mode once the batteries are full. Older manual chargers can overcharge, so check your charger and cart instructions before leaving it plugged in.
How long does it take to charge golf cart batteries?
Lead-acid golf cart batteries usually take about 8 to 10 hours to fully charge, depending on how low they were. Lithium batteries typically charge in about 3 to 6 hours.
Do golf cart batteries last longer if you use them more?
Lead-acid golf cart batteries tend to do better with regular use and regular charging than sitting unused for long periods. But very heavy daily use wears through their charge cycles faster, so balance matters.
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