Notes For Onyx 23AH Battery Diagnostics

If your battery continues to cut off prematurely after following the instructions, it likely has a bad cell. Onyx 23Ah batteries are now aging and generally not worth repairing. The best course of action is to contact your local waste management or Department of Environmental Protection for guidance on proper battery disposal.

Onyx 23AH Battery Balancing Diagnostics

If your Onyx 23Ah battery is cutting off prematurely above 65 volts, it is likely unbalanced. Follow the steps below to determine the extent of your battery’s imbalance. Purchasing an affordable outlet meter offers valuable insights into the battery’s charging and balancing behavior, making it a useful diagnostic tool.

By monitoring these metrics, you can confirm the BMS is functioning correctly and proactively address any imbalances, ensuring optimal battery performance and longevity.

Testing that the Onyx 23ah battery is Balancing

To verify if the Onyx 23Ah battery’s balancing feature is working, follow these steps:

Preparation

  • Ensure the battery is fully charged to 100%.
  • Use an outlet meter to monitor the charger’s wattage during the process.

Steps to Test Balancing

  • Charge Monitoring: Plug the charger into an outlet meter and set it to display wattage.
  • Fully charge the battery until the charger light indicates 100%.

Observe Wattage After Full Charge:

  • Wait for at least 3 hours after the charger indicates the battery is fully charged.
  • Check the outlet meter: Active Balancing: If the wattage fluctuates between 2.9W and 3.2W or higher, the battery is balancing.
  • No Balancing: If the wattage remains steady at a low value (e.g., 0.5W), the BMS is not balancing.

Onyx 23AH Battery Alternate Balance Discharge Test

If you suspect the battery is unbalanced, you can also perform a discharge test:

Discharge the Battery:

  • Ride your Onyx and drain the battery down to 69V.

Throttle Test:

  • Switch to Sport mode.
  • From a standstill, fully twist the throttle while observing the voltmeter.

Monitor the Cut-Off Voltage:

  • If the battery cuts off at 64V or higher, it indicates an imbalance.
  • A balanced battery should cut off closer to 60V.

Onyx 23AH Battery Estimated Balancing Time

  • Cuts out at 62 volts: Requires ~24 hours of balancing.
  • Cuts out at 68 volts: Requires ~48 hours of balancing.
  • Cuts out at 74 volts: Requires ~70 hours of balancing.

Onyx 23AH Battery Outlet Meter Watts Meaning

  • Charging: 100W–1700W
  • Constant Voltage: 35W–100W
  • Balancing: 2.9W–30W
  • Fully Balanced: 1.3W–2.7W