About this replacement
Range Rover EVOQUE 2018–2020 — 3.7V Li-ion Replacement Battery (LR089861)
This 3.7V, 2600mAh Li-ion cell replaces the OEM battery (LR089861) inside the Range Rover EVOQUE emergency communication and safety supply unit. It fits the 2018, 2019, and 2020 EVOQUE as well as the SPORT 2014 and additional model years sharing the same cell format. When the main vehicle electrical system goes down, this battery keeps the emergency communication hardware operational.
- EVOQUE and SPORT platform compatibility: These models share the same emergency supply module housing, connector pinout, and BMS handshake protocol — the cell slot accepts the same 66.00 × 20.80 × 18.70mm cylindrical format across all listed years.
- Bench tested on actual hardware: We ran this cell through the emergency supply module's charge acceptance and BMS recognition sequence. The management system acknowledged the battery within the expected window and cleared the pending battery-check flag without manual intervention.
- Post-installation charge cycle: After fitting this cell, plug the vehicle into mains power for at least two hours before relying on the emergency unit. The module's management firmware will not accept a runtime estimate from the battery until it completes one full charge cycle from the new cell.
Why the EVOQUE emergency unit shows a battery error immediately after installation
The emergency supply module runs a battery-check sequence the moment a new cell is detected. Until the firmware sees a complete charge cycle from the replacement cell, it flags the battery state as unverified and displays an error on the module or in the vehicle's telematics readout. This is not a fault with the cell itself — it is the management system withholding trust until charge data is established. Allow the unit to charge fully at 4.2V before the error clears. Most modules resolve the flag within two hours on charge.
Emergency supply self-test failure after battery swap
The EVOQUE emergency module performs a periodic self-test that checks whether the battery can sustain a short load pulse above a threshold voltage. A freshly installed cell that has not completed a full charge cycle will sag below the threshold during this pulse and trigger a self-test failure. The fix is straightforward: charge the unit fully, then allow the module to run one complete charge-discharge calibration cycle before the next scheduled self-test. If the test still fails after a full cycle, verify the cell voltage at the connector — it should read at or above 3.7V under no load.