Most golf cart owners can tell you their cart "has six batteries." Ask what voltage the pack runs, what chemistry those batteries are, or what the amp-hour number means, and you'll usually get a shrug. That's a problem — because every maintenance decision, every charger purchase, and every upgrade starts with knowing exactly what's under the seat.
This is the plain-English version. No spec-sheet jargon, no brand names. By the end you'll be able to open the battery bay, read the labels, and know your pack's voltage, chemistry, and capacity — and why each one matters.
- Golf cart packs come in three common voltages: 36V, 48V, and 72V.
- The three chemistries you'll meet are flooded lead-acid, AGM (sealed lead-acid), and LiFePO4 lithium.
- Amp-hours (Ah) — not just voltage — decide your real-world range.
- Cells are wired in series to raise voltage; the pack total is the sum of each cell's rating.
- Know your chemistry before you buy a charger or plan maintenance.
Table of Contents
What a "Battery Pack" Actually Is
A golf cart doesn't run on one giant battery. It runs on a pack — a group of individual 6-volt or 8-volt (sometimes 12-volt) batteries wired together to hit the cart's total voltage. Six 8-volt batteries in series make 48 volts. Eight 6-volt batteries in series also make 48 volts. Same pack voltage, different building blocks.
The takeaway: when someone says "my cart is 48-volt," they're describing the pack, not any single battery.
Pack Voltage: 36V, 48V, and 72V
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36V — common on older or lighter carts, neighborhood runabouts, and some utility vehicles. Usually built from six 6V batteries.
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48V — the modern default for most consumer and fleet golf carts. Best balance of power, range, and parts availability. Built from six 8V or eight 6V batteries.
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72V — found on high-performance, lifted, or heavy-duty carts that need more torque and speed. Usually six 12V batteries or a factory lithium pack.
Higher voltage generally means more efficient power delivery and better performance under load, but it also means a different charger and (for lithium) a different BMS profile. Match voltage to the cart the manufacturer built it for.
The Three Chemistries
This is the part that drives every later decision.
Flooded Lead-Acid
The budget classic. Each cell has removable caps and liquid electrolyte you top up with distilled water. Cheapest upfront, but highest upkeep: watering, equalization, and corrosion control. Skip the routine and a 5–7 year life turns into 2–3.
AGM (Sealed Lead-Acid)
Absorbed Glass Mat batteries are sealed and "recombine" gas back into water, so there's nothing to top up. They cost more than flooded but remove the watering chore. Still need disciplined charging and don't love deep discharges.
LiFePO4 (Lithium)
Lithium iron phosphate runs on a built-in Battery Management System (BMS) that balances cells and cuts power on faults. No watering, no equalization, no fumes. Lighter, charges faster, and lasts 8–12+ years. The trade-off: it needs a lithium-matched charger, and you'll want to understand what the BMS app is telling you — we cover that in our understanding your BMS guide.
Quick comparison
|
Flooded Lead-Acid |
AGM |
LiFePO4 |
| Upfront cost |
Low |
Medium |
Higher |
| Watering |
Yes |
No |
No |
| Weight |
Heaviest |
Heavy |
Lightest |
| Typical lifespan |
5–7 yrs |
5–7 yrs |
8–12+ yrs |
| Charger |
Lead-acid |
Lead-acid |
Lithium-matched |
Capacity: What Amp-Hours (Ah) Really Mean
Voltage tells you how hard the pack pushes; amp-hours (Ah) tell you how long it can push. A 48V 100Ah pack stores roughly 4.8 kWh of usable energy (48 × 100 ÷ 1000). Double the Ah and you roughly double the range — assuming the same voltage and load.
For a typical 48V cart, you'll see packs from about 60Ah (light neighborhood use) up to 150Ah+ (long-range fleets or hilly courses). More Ah means more range, but usually more weight and cost. Match capacity to how far and how hard you actually drive, not to the biggest number on the shelf.
Series vs Parallel: How Packs Are Built
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Series (positive of one battery to negative of the next) adds voltage while capacity stays the same. Six 8V 100Ah batteries in series = 48V 100Ah.
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Parallel (like terminals connected) adds capacity while voltage stays the same. Less common in factory carts, but it matters if you expand a bank.
Most golf cart packs are series-only. The number of batteries and their individual voltage is what sets the pack total — which is exactly why identifying each battery matters more than guessing the pack.
How to Identify Your Own Pack
Open the bay and look:
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Count the batteries and read the voltage printed on each (6V / 8V / 12V).
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Multiply individual voltage × count → that's your pack voltage (6 × 8V = 48V).
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Find the Ah rating on the label — that's capacity.
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Check for vent caps (flooded) vs a sealed case (AGM) vs a label marked LiFePO4 (lithium).
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Note the brand and model for charger and replacement matching.
Still unsure? Snap a photo of the label and compare against our golf cart battery maintenance SOP, which walks chemistry-specific care once you know what you have.
Why This Matters for Chargers and Maintenance
Two practical consequences of knowing your pack:
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Chargers are chemistry- and voltage-specific. A lead-acid charger's float stage can quietly damage a LiFePO4 pack. A 36V charger won't fill a 48V pack. Identifying your pack first prevents an expensive mistake — our golf cart charging best practices guide covers the rules.
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Storage depends on chemistry. Flooded and AGM want a full charge plus a maintainer over winter; LiFePO4 wants 50–80% SOC. Mixing those up is the #1 cause of a dead cart in spring — our winter storage guide lays out both.
If you're weighing flooded vs lithium on cost, our lithium vs lead-acid total cost of ownership breakdown puts real numbers on the 5–7 vs 8–12 year gap.
FAQ
How do I know if my golf cart is 36V or 48V? Count the batteries and multiply each one's voltage by the count. Six 6V batteries = 36V; six 8V (or eight 6V) = 48V. The cart's ID plate sometimes states it too.
Are LiFePO4 and lead-acid batteries interchangeable in the same cart? Electrically you can swap a pack if the voltage matches, but you must also switch to a lithium-compatible charger and confirm the cart's wiring suits the new pack. For most carts it's a conversion, not a drop-in.
What does Ah mean for my daily driving? Ah sets range. A 48V 100Ah pack gives roughly double the distance of a 48V 50Ah pack under the same conditions. Match Ah to your typical round length plus a buffer.
Do I need to water AGM or LiFePO4 batteries? No. Only flooded lead-acid needs watering. AGM is sealed; LiFePO4 is managed by its BMS and needs no water.
Can I mix old and new batteries in a pack? Avoid it. Mismatched ages or capacities drag the whole pack down to the weakest cell's performance and shorten life. Replace as a set.
Conclusion
Battery basics aren't exciting, but they're the foundation everything else sits on. Know your pack's voltage, chemistry, and capacity, and every later choice — charger, watering, storage, upgrade — gets simpler and cheaper. Start with the maintenance SOP once you've identified what you're working with, and you'll keep that cart running for the full life of the pack.
