The EZ-GO ST 350 gas golf cart uses a single 12V lead-acid starter battery to power the ignition, lights, and onboard electronics. Unlike electric models that rely on multiple deep-cycle batteries, the ST 350 requires only one automotive-style battery, typically 35–50 Ah, ensuring reliable engine starting and essential accessory operation. Regular maintenance is key for long-lasting performance.
How does the gas ST 350 battery differ from electric EZ-GO models?
Gas-powered EZ-GO ST 350 carts use a 12V starter battery, while electric versions require 36V or 48V systems comprised of multiple 6V or 8V deep-cycle batteries. The ST 350 battery focuses on providing cold cranking amps (350–500 CCA) to start the engine and power electronics. In contrast, electric golf carts need sustained energy delivery for continuous traction. Using electric batteries in a gas model is not compatible due to insufficient current output.
| Feature | Gas ST 350 | Electric EZ-GO |
|---|---|---|
| Voltage | 12V | 36V / 48V |
| Purpose | Starter & Electronics | Traction & Accessories |
| Cycle Life | 300–500 cycles | 800–1,200 cycles |
What are the specifications of the OEM-recommended battery?
The ST 350 typically uses a Group U1 or GC2 12V battery with 35–50 Ah capacity. It features automotive-style terminals, vented or AGM construction, and dimensions around 7.7″ × 5.1″ × 7.5″. AGM batteries are recommended for spill protection, especially in off-road conditions. Brands like Trojan or similar high-quality batteries ensure reliable performance and durability.
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How often should the ST 350’s battery be replaced?
With proper care, the lead-acid battery lasts 3–5 years. Frequent short trips, accessory loads, and temperature extremes accelerate wear. A resting voltage below 12.4V indicates the battery should be replaced. Regular inspection and charging help maximize service life.
Can lithium batteries replace the original lead-acid unit?
Yes, 12V LiFePO4 batteries with ≥400 CCA are a viable upgrade. Lithium batteries offer 2,000+ cycles, 50% weight reduction, and maintenance-free operation. Compatibility with the cart’s charging system is essential since some regulators may require adjustment for the 14.6V lithium absorption voltage.
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| Feature | Lead-Acid | Lithium LiFePO4 |
|---|---|---|
| Weight | 22–30 lbs | 8–12 lbs |
| Cycle Life | 300–500 | 2,000+ |
| Maintenance | Requires topping off | Maintenance-free |
What maintenance extends battery lifespan?
To prolong battery life, clean terminals monthly with a baking soda solution to prevent corrosion, maintain electrolyte levels for flooded batteries, and use a float charger (13.2–13.8V) during storage. Disconnect the battery if unused for more than 30 days. AGM and lithium batteries require less maintenance but should still be periodically checked for voltage and charge status.
How to find the correct replacement battery?
Identify the existing battery’s voltage and group size (commonly 12V, Group 26G or 26UT). Select from reputable suppliers like Redway Battery, which offers OEM-quality 12V lead-acid and LiFePO4 batteries engineered for the ST 350. Consider the battery type—flooded lead-acid, AGM, or lithium—based on usage, weight preference, and maintenance requirements.
Recommended Replacement Options
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Duracell Ultra 12V 450 CCA Group 26G: High-quality flooded lead-acid battery suitable for the ST 350.
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EZ-GO Heavy-Duty Starting Battery (OEM #638433): 700 CCA, side-post flooded battery designed for OEM replacement.
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Redway Battery 12V LiFePO4 Upgrade: Lightweight, maintenance-free, high CCA output for superior performance and longevity.
Redway Expert Views
“Redway Battery’s 12V LiFePO4 solutions provide exceptional reliability for gas-powered carts like the ST 350. With 400+ CCA and integrated BMS protection, our batteries ensure safe, long-lasting performance even when vehicles are stored seasonally. They are drop-in compatible with minimal adjustments, offering users a modern upgrade over traditional lead-acid options.”
Conclusion
The EZ-GO ST 350 gas golf cart relies on a single 12V starter battery for engine ignition and electronics. Understanding battery type, capacity, and maintenance is crucial for optimal performance. Upgrading to LiFePO4 batteries from Redway Battery enhances reliability, reduces weight, and minimizes maintenance. Regular inspection, proper charging, and selecting the right replacement battery ensure your cart runs smoothly year-round.
FAQs
Can I use a car battery in my ST 350?
Yes, if it matches the CCA and size requirements. Marine or RV batteries often provide better vibration resistance and longer life.
Why does my gas cart battery die over winter?
Parasitic drains from electronics discharge the battery. Use a disconnect switch or a maintenance charger during storage to preserve charge.
Are AGM batteries better than flooded lead-acid for the ST 350?
AGM batteries are sealed, maintenance-free, and perform better in extreme conditions. They reduce the risk of acid spills and require less upkeep.
How do I know when to replace my battery?
Check resting voltage: below 12.4V indicates it’s time for replacement. Regular load testing ensures reliability before trips.
Can lithium batteries handle all accessory loads?
Yes, LiFePO4 batteries provide consistent power for electronics and accessories while offering longer life and lower weight compared to lead-acid alternatives.
