The Antigravity ATX20-HD is a high-power, lightweight LiFePO4 lithium battery designed as a Heavy Duty replacement for the popular YTX20 lead-acid battery. Built for demanding applications, it delivers significantly higher cranking power and amp-hour capacity, making it ideal for touring motorcycles, performance vehicles, racing, and other high-power uses.
Specifications
- YTX20 standardized case size: 6.89 x 3.4 x 5.12 in. (L x W x H)
- 780 Cranking Amps
- 30Ah (PbEq) / 15Ah (Actual) / 192Wh
- Weight: 5.18 lbs
- Integrated voltage indicator
- LiFePO4 lithium chemistry with full Battery Management System (BMS)
- Compatible with multiple OEM battery sizes
- Mounts in any orientation
- Model: ATX20-HD
Key Features
- Heavy Duty design with significantly higher capacity and cranking power than the standard ATX20.
- Full Battery Management System (BMS) with:
- Over-discharge protection
- Over-charge protection*
- Thermal protection
- Real-time cell balancing
- Built-in voltage indicator for quick battery status checks.
- Up to 2x the cranking power of comparable lead-acid batteries.
- Up to 70% lighter than equivalent lead-acid batteries.
- Long service life with up to twice the lifespan of conventional lead-acid batteries.
- Four-terminal design for flexible installation with left- or right-side positive/negative connections.
- Shock and vibration resistant for street, off-road, racing, and aviation applications.
- Low self-discharge for long-term storage.
- Acid-free and contains no lead, cadmium, or mercury.
Note: The ATX20-HD does not include RE-START built-in jump-start technology. Instead, it provides greater usable capacity and higher cranking performance.
Recommended Applications
- Direct replacement for compatible OEM lead-acid batteries.
- Ideal for stock motorcycles up to 1700cc.
- Excellent for touring and adventure motorcycles with additional electrical accessories.
- Suitable for race cars up to 700 horsepower.
- Can be used in experimental aircraft and other high-demand 12V applications.
- Not recommended for personal watercraft (PWC).
Replaces OEM Battery Sizes
- YTX Series: YTX15, YTX15L, YTX15L-BS, YTX20, YTX20-BS, YTX20L, YTX20L-BS, YTX20H, YTX20H-BS, YTX20HL, YTX20HL-BS, YIX20HL
- GYZ Series: GYZ20H, GYZ20L, GYZ20HL
Important Notes
- For large V-Twin engines up to 135 cubic inches, Antigravity recommends the ATX30-HD, YTX20, or YTX12-24 models. Motorcycles should be equipped with compression releases.
- Use only lithium-specific powersport battery chargers. Do not use lead-acid chargers.
- Over-charge protection cannot prevent damage caused by a faulty or failing voltage regulator.
Enjoy free shipping on orders over $30, with most items shipping within 2 business days.
We offer hassle-free returns and exchanges within 90 days of delivery, with no restocking fees.
View our Shipping Policy and Return Policy for full details.
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