Maximum Cranking Power: 310 CCA

Older engines, especially high-compression Shovelhead and Evolution builds, require significant amperage to overcome mechanical resistance. This Twin Power battery delivers a robust 310 Cold Cranking Amps (CCA), providing a significant boost over standard 270 CCA alternatives. This extra power ensures faster starts and less strain on your starter motor, even after the bike has been sitting in a cold garage.

Advanced AGM & Vibration Resistance

Classic Harleys are famous for their “character,” which often includes intense engine vibration. Standard flooded batteries can fail prematurely as vibration causes internal plates to shed material. The Twin Power High Performance battery utilizes AGM technology, where the electrolyte is trapped in fiberglass mat separators. This creates a spill-proof, leak-proof, and highly vibration-resistant structure that can withstand the rigors of rigid mounts and high-torque pulses.

Premium Build: Lead-Calcium Technology

Engineered with lead-calcium alloy plates, this battery offers a much lower self-discharge rate compared to traditional lead-antimony batteries. This means your battery stays charged longer during the off-season. Additionally, it features heavy-duty flush-mount terminals that provide superior conductivity and eliminate the need for annoying spacers, ensuring a secure and efficient connection to your bike’s wiring harness.

Factory Activated: Ready to Ride

There is no need to handle hazardous acid or perform an initial slow-charge on your workbench. This battery is Factory Activated, meaning it is filled, sealed, and fully charged at the factory under strictly controlled conditions. It is 100% maintenance-free; once installed, you never have to check fluid levels or add water. This “plug-and-play” convenience gets you out of the garage and back on the road in minutes.

Fitment and Compatibility (1974–1996)

This battery is a direct premium replacement for Harley-Davidson OEM Part Numbers 65991-82A and 65991-82B. It is designed to fit:

• Harley Sportster (XL): 1979–1996 models.
• Harley Softail (FXST/FLST): 1984–1990 models.
• Harley FXR: All models from 1982–1994.
• Harley FXE/FX Super Glide: 1974–1986 models.
• Custom V-Twins: Ideal for Evolution and Shovelhead custom builds requiring a 20L-sized battery.