ONYX RCR 45Ah Battery — Fitment & Install Guide

May 09, 2025Ivan Ceja
ONYX RCR 45Ah Battery — Fitment & Install Guide

ONYX RCR 45Ah Battery Fitment & Install Guide

🚨 Before You Begin:
 This guide is for riders installing the ONYX 45Ah 72V battery into their RCR.

 

 

🔌 Connector Compatibility

The 45Ah battery uses a QS8 connector.
 If your RCR has an Anderson connector, you’ll need to upgrade your battery cable:

 👉 ONYX QS8 Battery Cable

🔧 You may also reference the ONYX RCR QS8 Main Battery Cable Installation Guide


 

 

🛠️ Frame Compatibility

  • V1.5 Frames: Battery fits like a 41Ah/23Ah unit.
     Tilt the battery slightly — seat side down first — for a clean fit.

  • V1 Frames: Slight modification is required. Here's how:

 

 

✂️ Modifying a V1 Frame

  1. Remove panels and battery (if one is installed).

  2. Cut slits in the right and left sides of the battery tray, as shown in our reference photos. The battery is pictured below for reference, but any cutting and/or bending should be performed with the battery removed from the tray. This is to be done on both sides of the bike. 



  1. Bend outward slightly using a mallet or pliers to create extra clearance.



  1. Insert the battery using the same seat-side-down angle mentioned above.

  2. Secure the battery using straps (recommended for all RCR models).

  3. Reinstall your panels and seat.

 

 

⚡ Ready to Ride

Once connected, power on your RCR and enjoy the extended range and performance boost that the 45Ah battery unlocks.

Need help?
 📲 Text or call us at 424-855-1424, Mon–Fri, 10AM–4PM PT.