Lead-acid golf cart batteries last 4-6 years. Lithium-ion batteries last 8-10 years. Actual lifespan depends on how often you charge them, how deep you discharge them, and whether you maintain them properly.
Battery types compared
| Type | Lifespan | Cost (full set) | Weight | Maintenance |
|---|---|---|---|---|
| Flooded lead-acid | 4-6 years | $600-1,200 | ~360 lbs (6 batteries) | Monthly water checks |
| AGM lead-acid | 4-7 years | $900-1,800 | ~330 lbs (6 batteries) | None |
| Lithium-ion | 8-10 years | $2,000-5,000 | ~100-150 lbs | None |
Lithium batteries cost 3-4x more upfront but last roughly twice as long and weigh 60% less. Over a 10-year period, total cost of ownership is similar.
What kills batteries early
Deep discharging
Running lead-acid batteries below 20% charge damages them. Each deep discharge shortens their life. Charge after every use, even if you only played 9 holes. Lithium batteries handle deep discharges better but still benefit from regular charging.
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Undercharging
Always charge to 100%. Unplugging at 80% regularly causes sulfation in lead-acid batteries (crystals form on the plates and reduce capacity). Use an automatic charger that shuts off when full.
Water loss (flooded lead-acid only)
Flooded batteries have liquid electrolyte that evaporates over time. Check water levels monthly. Add distilled water (never tap water) to keep the plates covered. Let the battery charge fully before adding water, otherwise the electrolyte will overflow when it heats up during charging.
Extreme temperatures
Heat accelerates chemical degradation. Cold reduces capacity temporarily. If you store your cart for winter, charge batteries to 100% and disconnect them. Recharge every 30-60 days during storage.
Maintenance schedule
| Task | Frequency | Applies to |
|---|---|---|
| Charge after use | After every use | All types |
| Check water levels | Monthly | Flooded lead-acid only |
| Clean terminals | Every 2-3 months | All types |
| Check connections | Every 3 months | All types |
| Load test | Annually | Lead-acid |
| Equalization charge | Monthly or per manufacturer | Flooded lead-acid |
Signs your batteries need replacing
- Cart loses power going up hills it used to handle fine
- Range drops below 50% of what it was when new
- Batteries take much longer to charge (or won't reach full charge)
- Visible damage: swelling, cracking, or leaking acid
- Cart is noticeably slower on flat ground
Cost of replacement
A standard electric golf cart uses 4, 6, or 8 batteries depending on the voltage system (36V or 48V). Most modern carts are 48V with either six 8V batteries or four 12V batteries.
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- Six 8V flooded batteries: $600-1,200 total
- Six 8V AGM batteries: $900-1,800 total
- One lithium battery pack: $2,000-5,000
Installation at a golf cart dealer adds $50-150. DIY is straightforward if you're comfortable with basic electrical connections.
For more on golf cart ownership, see our golf carts buying guide and age requirements for driving.
