Choosing a lightweight race car battery is critical for shedding pounds and improving performance. We researched, compared, and evaluated the top options using manufacturer specifications, published industry standards (SAE, BCI), and aggregated owner feedback. Our evaluation focuses on weight savings, cold cranking amps (CCA), reserve capacity, vibration resistance, and safety compliance. Here are the seven best lightweight race car batteries for your build.
| Photo | Product | Score | Buy |
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Antigravity Batteries ATX-20 Restart Top Pick 12V, 20Ah, 650 CCA, 3.5 lbs, lithium-ion |
9.2 | 🛒 Check Price |
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Braille Battery B3121 Runner Up 12V, 21Ah, 510 CCA, 11.5 lbs, AGM |
8.8 | 🛒 Check Price |
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Odyssey PC680MJT Proven Performer 12V, 17Ah, 680 CCA, 15 lbs, AGM |
8.5 | 🛒 Check Price |
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Shorai LFX14L2-BS12 Lithium Powerhouse 12V, 14Ah, 315 CCA, 2.5 lbs, lithium-iron phosphate |
8.2 | 🛒 Check Price |
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Deka ETX20L Budget Friendly 12V, 18Ah, 320 CCA, 12.5 lbs, AGM |
7.8 | 🛒 Check Price |
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XS Power D680 High CCA Option 12V, 20Ah, 680 CCA, 16 lbs, AGM |
7.5 | 🛒 Check Price |
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Lifeline GPL-900 Premium AGM 12V, 12Ah, 450 CCA, 9.5 lbs, AGM |
7.3 | 🛒 Check Price |
1. Antigravity Batteries ATX-20 Restart: Top Pick
In our evaluation, the Antigravity ATX-20 Restart stands out for its innovative restart technology. This lithium-ion battery delivers 650 CCA and weighs only 3.5 lbs, making it one of the lightest options. The built-in BMS ensures safe operation, and owner feedback highlights its reliability even in cold weather. However, the high initial cost may deter budget-conscious racers.
This battery is ideal for those who want peace of mind with the restart feature, but if you have a tight budget or need a higher reserve capacity for long cranking, consider a different pick. Not recommended for vehicles with extreme vibration issues without proper mounting.
- Restart technology prevents battery drain from parasitic loads
- Replaces lead-acid batteries up to 50% lighter
- Built-in battery management system (BMS) for overcharge and short circuit protection
Pros: Outstanding restart feature saves the day; Very lightweight at just 3.5 lbs; Consistent high CCA for reliable starts
Cons: Premium price point compared to lead-acid
2. Braille Battery B3121: Runner Up
The Braille B3121 is a top-tier AGM battery that we found to be a reliable workhorse. Based on owner feedback and spec sheets, it offers a solid 510 CCA at 11.5 lbs, which is about half the weight of a conventional battery. Its spill-proof and vibration-resistant design makes it suitable for track use. However, compared to lithium batteries, it is heavier and has a lower CCA.
This battery is a great choice for racers who prefer AGM technology for its durability and safety, but if you need the absolute lightest weight or higher CCA for a high-compression engine, you might want to look at lithium options. Skip this if you are on a strict weight-saving mission.
- AGM design provides spill-proof and vibration-resistant construction
- Weighs 11.5 lbs, a significant reduction from standard batteries
- Maintenance-free with a long service life
Pros: Excellent build quality and durability; Good balance of weight and power; Vibration-resistant for racing conditions
Cons: Not as light as lithium options; Lower CCA than some competitors
3. Odyssey PC680MJT: Proven Performer
The Odyssey PC680MJT is a well-known performer in the racing community. We researched its specs and owner feedback: it delivers 680 CCA at 15 lbs, making it one of the most powerful AGM batteries per pound. Its vibration resistance is top-notch, and many users report years of trouble-free service. However, at 15 lbs, it is not the lightest option, and the terminal configuration might need modification for some applications.
This battery is ideal for racers who prioritize durability and high CCA over minimal weight. If you are building a dedicated track car and every pound counts, a lithium battery may be a better fit. Skip this if you need a battery that weighs under 10 lbs.
- High CCA for its size, 680 CCA at only 15 lbs
- Extreme vibration resistance with a rugged case
- Long service life with up to 10 years design life
Pros: Proven reliability in racing and off-road; High CCA for quick starts; Durable AGM construction
Cons: Heavier than lithium alternatives; Terminal layout may require adapter
4. Shorai LFX14L2-BS12: Lithium Powerhouse
The Shorai LFX14L2-BS12 is a lithium-iron phosphate battery that weighs just 2.5 lbs, making it one of the lightest options. We compared its specs and found it delivers 315 CCA, which is sufficient for many four-cylinder race cars but may struggle with high-compression V8s. Owner feedback notes that it performs well in warm conditions but can be finicky in cold weather. The included balancer helps maintain charge during storage.
This battery is perfect for weight-obsessed racers with smaller engines, but if you need more cranking power or live in a cold climate, you may want to consider a higher CCA option. Skip this if your engine requires more than 400 CCA for reliable starts.
- Extremely lightweight at only 2.5 lbs
- Lithium-iron phosphate chemistry for safety
- Includes a balancer for long-term storage
Pros: Incredible weight savings; Maintenance-free and spill-proof; Good for small engines and motorcycles
Cons: Lower CCA may not start large engines; Sensitive to cold temperatures
5. Deka ETX20L: Budget Friendly
The Deka ETX20L is a budget-friendly AGM battery that we found to be a solid choice for cost-conscious racers. It weighs 12.5 lbs and offers 320 CCA, which is adequate for many street-driven track cars. Owner feedback indicates it holds up well under normal use, but it may not withstand extreme vibration or high-drain applications. Its AGM design is spill-proof and maintenance-free.
This battery is best for entry-level racers or those on a tight budget. If you are competing in a serious racing series or need higher CCA for a high-performance engine, you should invest in a more capable battery. Skip this if weight is your top priority.
- Affordable AGM battery with decent weight savings
- Spill-proof and vibration-resistant
- Replacement for many OEM applications
Pros: Great value for the price; Reliable AGM construction; Good for budget builds
Cons: Moderate CCA for racing use; Heavier than premium options
6. XS Power D680: High CCA Option
The XS Power D680 is an AGM battery that emphasizes high CCA. We evaluated its specs: 680 CCA at 16 lbs, making it a powerful but relatively heavy option. Owner feedback is mixed; some praise its starting power, while others note premature failure in extreme racing conditions. It is best suited for street-driven track cars that need extra cranking amps.
This battery is a good choice if you need high CCA without jumping to lithium, but if you are looking for a long-lasting lightweight battery, consider other options. Skip this if you require a weight under 12 lbs or have a very high-vibration environment.
- High 680 CCA for reliable starts in demanding conditions
- AGM construction for durability
- Compact size fits many applications
Pros: Strong cranking power; Good for high-compression engines; Reasonable weight for the power
Cons: Heavier than lithium competitors; Some reports of short lifespan under heavy use
7. Lifeline GPL-900: Premium AGM
The Lifeline GPL-900 is a premium AGM battery that we found to be exceptionally durable. It weighs 9.5 lbs and offers 450 CCA, which is adequate for many race cars. Owner feedback highlights its long service life and ability to handle deep discharges. However, its cost is high relative to its capacity, and the CCA may not be sufficient for high-compression engines.
This battery is ideal for racers who value longevity and are willing to pay a premium. If you need maximum CCA or the lightest weight possible, look elsewhere. Skip this if you are on a strict budget or require more than 500 CCA.
- High quality AGM with excellent cycle life
- Weighs 9.5 lbs, lighter than many AGMs
- Designed for deep cycle and starting use
Pros: Very durable and long-lasting; Good for both starting and powering accessories; Lighter than typical AGM batteries
Cons: Expensive for the capacity; Lower CCA than some competitors
Frequently Asked Questions
What is the lightest race car battery available?
The lightest race car batteries are typically lithium-ion or lithium-iron phosphate models. For example, the Shorai LFX14L2-BS12 weighs just 2.5 lbs, while the Antigravity ATX-20 Restart is 3.5 lbs. These offer significant weight savings over AGM batteries, which usually weigh 9-16 lbs.
How do I choose between lithium and AGM for racing?
Lithium batteries are lighter and often have higher CCA per pound, but they are more expensive and can be sensitive to cold. AGM batteries are more affordable, durable, and reliable in extreme temperatures, but heavier. Consider your weight budget, engine requirements, and climate. For dedicated track cars, lithium is popular; for dual-use street/track, AGM may be better.
Can I use a lightweight race car battery in my daily driver?
Yes, but with caution. Lightweight batteries, especially lithium, may have lower reserve capacity and can be drained by parasitic loads if the car sits for long periods. Some lithium batteries have restart features to prevent this. AGM lightweight batteries are more tolerant. Ensure the battery meets your vehicle’s CCA and reserve capacity requirements.
What safety features should I look for in a race car battery?
Look for built-in battery management systems (BMS) for overcharge, over-discharge, and short circuit protection. AGM batteries are spill-proof and vibration-resistant. Lithium batteries should have a BMS and be certified to safety standards like UN38.3. Proper mounting and venting are also important.
How do I mount a lightweight race car battery?
Most lightweight batteries are smaller than standard, so you may need a battery tray or hold-down kit. Ensure the battery is securely mounted to prevent movement. Use a battery box or bracket that matches the battery’s dimensions. Some lithium batteries require a specific orientation to avoid damage.
Our Verdict
After researching and comparing the top lightweight race car batteries, our top pick is the Antigravity Batteries ATX-20 Restart for its innovative restart technology, excellent weight-to-power ratio, and safety features. The runner up is the Braille Battery B3121, which offers a great balance of durability and weight savings in an AGM package. Choose based on your specific needs for weight, power, and budget.
