The EZ-GO ST 350 gas-powered golf cart uses a 12V lead-acid starter battery to power ignition, lights, and accessories. Unlike electric models requiring 6V/8V battery banks, gas versions rely on a single automotive-style battery with 30–50 Ah capacity. Trojan or similar brands are recommended, with regular maintenance to prevent sulfation in intermittent use cycles.
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How does the gas ST 350’s battery differ from electric EZ-GO models?
Gas models use a 12V starter battery versus electric versions with 36V/48V systems. The ST 350’s battery primarily engages the starter motor and powers electronics, while electric carts employ deep-cycle batteries for sustained traction power.
Electric EZ-GO models typically configure six 8V batteries (48V total) or eight 6V units for 48V systems, emphasizing deep discharge capability. The gas variant’s 12V battery prioritizes cold cranking amps (CCA)—350–500 CCA is standard. A real-world example: A dead 12V battery in an ST 350 will prevent ignition despite functional fuel systems. Pro Tip: Use an AGM (Absorbent Glass Mat) battery to minimize acid spills during off-road driving.
What are the specifications of the OEM-recommended battery?
Original equipment often specifies Group U1 or GC2 batteries with 12V output and 35–50 Ah capacity. Key parameters include terminal type (automotive posts), dimensions (L7.7″×W5.1″×H7.5″), and vented/AGM construction.
| Parameter | Gas ST 350 | Electric Model |
|---|---|---|
| Voltage | 12V | 48V |
| Primary Use | Starter/Lights | Traction Motor |
| Cycle Life | 300–500 cycles | 800–1,200 cycles |
How often should the ST 350’s battery be replaced?
Expect 3–5 years with proper maintenance. Factors like frequent short drives, temperature extremes, or accessory loads (stereos, GPS) accelerate degradation. Voltage below 12.4V at rest indicates replacement need.
Can lithium batteries replace the original lead-acid unit?
Yes, using a 12V LiFePO4 battery with ≥400 CCA. Lithium offers 2,000+ cycles, 50% weight reduction, and maintenance-free operation. Ensure compatibility with the cart’s charging system—some voltage regulators may require adjustment for lithium’s 14.6V absorption voltage.
| Feature | Lead-Acid | Lithium |
|---|---|---|
| Weight | 22–30 lbs | 8–12 lbs |
| Cycle Life | 300–500 | 2,000+ |
| Cost | $90–$150 | $250–$400 |
What maintenance extends battery lifespan?
Monthly terminal cleaning with baking soda/water prevents corrosion. Keep electrolyte levels above plates in flooded batteries. For stored carts, use a maintainer providing 13.2–13.8V float charge. Disconnect batteries if inactive >30 days.
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FAQs
Yes, if it meets CCA and size specs. Marine/RV batteries often outlast automotive units in golf carts due to vibration resistance.
Why does my gas cart’s battery die over winter?
Parasitic drains (key-off current) discharge batteries. Install a disconnect switch or use a maintenance charger during storage.
