Harley-Davidson ® RH1250S, RH975/S (2022 - '25) Motorcycle Batteries

Reliability for the Modern Sportster: RH1250S & RH975 Battery Guide

The 2022-2025 Sportster models represent a significant technological leap, featuring advanced IMU-based rider aids and high-resolution displays. These systems require a battery that can maintain stable voltage even under heavy loads. The Big Crank ETX14L offers superior reserve capacity and faster recharge rates than standard factory units, ensuring your electronics function flawlessly every time you twist the throttle.

The Big Crank Advantage

The Big Crank ETX14L is the preferred replacement for riders who want factory-plus performance without the dealership price tag. It features a patented terminal design that ensures a flush, vibration-proof connection—essential for the compact battery compartment of the new Sportster chassis. The leak-proof AGM construction ensures that your bike’s finish and sensitive sensors remain protected from corrosive acid vapors.

Frequently Asked Questions

Does this battery fit the new Sportster S and the Nightster?

Yes. Both the RH1250S Sportster S and the RH975/S Nightster models from 2022 through 2025 utilize the ETX14L battery footprint. This battery is designed to fit perfectly within the specialized battery tray of the modern Revolution Max frame.

How does this battery compare to the original factory battery?

The Big Crank ETX14L is manufactured by East Penn (Deka) in the same Pennsylvania facility that produces many original equipment batteries for Harley-Davidson. When you choose a Big Crank, you are getting the exact same American-made quality, specifications, and AGM technology found at the dealership, but at a more rider-friendly price point.

Can I use a Lithium battery in my RH1250S or RH975?

Yes! Lithium (LiFePO4) is a popular choice for the modern Sportster series, especially for riders looking to maximize the performance-to-weight ratio. Lithium batteries offer an exceptionally low self-discharge rate and high cranking torque. If you choose lithium, be sure to use a Lithium-specific charger to keep the battery healthy and prevent cell damage.

How do I maintain my battery if I don't ride every day?

Modern Harleys feature sophisticated security systems and ECUs that draw a small amount of power even when the ignition is off. To prevent a dead battery and maximize lifespan, we recommend using a Battery Tender once a week. This maintains the battery at the ideal float voltage and prevents chemical sulfation.

Model Fitment Reference

This category is the definitive source for batteries fitting 2022-2025 Harley-Davidson Revolution Max Sportster models, including:

• RH1250S: Sportster S (2022-2025).
• RH975: Nightster (2022-2025).
• RH975S: Nightster Special (2023-2025).