What Is the Best Lithium Battery for a Harley Touring Model?

Lithium batteries are ideal for Harley Touring models due to their lightweight design, longer lifespan, and superior cold-cranking amps (CCA). Top options include the AntiGravity ATX-20 HD, EarthX ETX-36C, and Shorai LFX36A3-BS12. These batteries offer fast starts, deep-cycle resilience, and compatibility with Harley’s charging system. Choose based on CCA, warranty, and size compatibility with your touring bike.

What Is a CATL Battery Cell?

How Do Lithium Batteries Compare to Lead-Acid for Harley Touring Bikes?

Lithium batteries are 60-70% lighter than lead-acid, reducing bike weight and improving performance. They deliver higher CCA (800-1,000 amps) for reliable starts, last 3-5x longer (8-10 years), and charge faster. Unlike lead-acid, they don’t sulfate or degrade when discharged, making them ideal for infrequently ridden Harleys. However, they cost 2-3x more upfront.

Which Lithium Battery Brands Are Most Trusted for Harley Touring Models?

AntiGravity, EarthX, and Shorai dominate the Harley lithium battery market. AntiGravity’s ATX-20 HD features a built-in jump-start function. EarthX ETX-36C includes advanced battery management systems (BMS) for voltage regulation. Shorai’s LFX36A3-BS12 uses LiFePO4 chemistry for stability. All brands offer 2-5 year warranties and Harley-specific sizing.

AntiGravity stands out for its innovative Re-Start Technology, which automatically disconnects the battery before complete discharge and retains enough power for a restart. This is particularly useful for riders who frequently use accessories like GPS or heated grips. EarthX batteries excel in extreme conditions, with ruggedized cases that withstand vibrations common on long-distance rides. Their proprietary BMS monitors cell balance and temperature in real time, preventing overcharging even with Harley’s stator-based charging systems. Shorai focuses on affordability without compromising performance, using prismatic cells that fit OEM battery trays seamlessly. For riders prioritizing value, Shorai’s 4-year pro-rata warranty provides cost-effective long-term coverage.

Brand	Top Model	CCA Rating	Warranty
AntiGravity	ATX-20 HD	840A	3 Years
EarthX	ETX-36C	900A	5 Years
Shorai	LFX36A3-BS12	810A	4 Years

What Are the Key Features to Look for in a Harley Lithium Battery?

Prioritize CCA (600+), Ah capacity (18-36Ah), and direct-fit compatibility with Harley Touring models (e.g., Electra Glide, Road King). Ensure BMS protects against overcharge/over-discharge. Vibration resistance is critical for long rides. Waterproof casings and Bluetooth diagnostics (e.g., AntiGravity Re-Start Tech) add value. Verify terminal placement matches OEM specs.

How to Install a Lithium Battery in a Harley Touring Motorcycle?

Disconnect negative terminal first. Remove old battery, clean terminals with baking soda, and inspect wiring. Place lithium battery, ensuring polarity matches (+/-). Secure with brackets to prevent vibration. Reconnect terminals, torque to 6-8 Nm. Charge fully before first use. Avoid jump-starting unless the battery supports it (e.g., AntiGravity’s built-in feature).

When installing, use dielectric grease on terminals to prevent corrosion, especially in humid climates. Harley Touring models often have tight battery compartments, so measure the new lithium unit against your factory specs—some aftermarket batteries require foam spacers. After securing the battery, perform a voltage test with the ignition off (should read 13.2-13.4V) and at idle (14.2-14.6V). For bikes with CANbus systems, reset the battery monitoring module using a diagnostic tool to ensure accurate charge tracking. Always wear safety glasses when handling terminals, as lithium batteries can arc if shorted.

Step	Tool Required	Torque Spec
Terminal Removal	8mm Socket	N/A
Bracket Installation	Torque Wrench	6-8 Nm
Terminal Reconnection	10mm Socket	4-6 Nm

Can Lithium Batteries Handle Extreme Temperatures on Long Rides?

Lithium batteries perform better in cold (-4°F to 140°F) than lead-acid. EarthX and AntiGravity use BMS to prevent overheating. However, prolonged exposure to 140°F+ (e.g., engine heat) may reduce lifespan. Insulate batteries with heat shields and avoid direct sunlight storage. Most lithium batteries maintain 80% charge at 32°F.

What Are the Warranty and Maintenance Requirements for Lithium Batteries?

Warranties range from 2 years (Shorai) to 5 years (EarthX). Avoid deep discharges below 10V, which void warranties. Store at 50% charge if unused for months. Use lithium-specific chargers (e.g., NOCO Genius). No acid leaks or watering needed. Monthly voltage checks (12.8-13.2V) ensure health.

“Lithium batteries revolutionize Harley touring by cutting weight and boosting reliability. Brands like EarthX integrate BMS to prevent voltage spikes, critical for modern electronics. Always check fitment charts—some ‘universal’ batteries require spacer kits. For riders adding heated gear, prioritize high Ah ratings.”
— John Mercer, PowerSports Battery Specialist

Conclusion

The best lithium battery for Harley Touring models balances CCA, size, and advanced BMS. AntiGravity and EarthX lead in innovation, while Shorai offers budget-friendly durability. Proper installation and maintenance ensure a decade of starts. Invest in a lithium-specific charger and verify warranty terms for long-term value.

FAQs

Q: Are lithium batteries safe for Harley’s charging system?

A: Yes, if they include BMS. Modern lithium batteries regulate voltage to stay within Harley’s 14.4V limit.

Q: Can I use a car lithium battery in my Harley?

A: No—car batteries lack vibration resistance and correct terminal placement. Use motorcycle-specific models.

Q: Do lithium batteries work with Harley’s security systems?

A: Yes, but ensure the battery maintains 12.8V+ during parking mode. EarthX ETX-36C is optimized for low draw.