Ronda 16KR-SCH Emergency Light Replacement Battery 19.2V 2000mAh

Ronda FRESC1600L8X2 — 19.2V Ni-CD Replacement Battery (16KR-SCH)

This is a 19.2V, 2000mAh nickel-cadmium replacement battery for the Ronda FRESC1600L8X2 emergency lighting unit. It restores backup illumination function to the fitting after the original cell pack has degraded or failed. Voltage and cell count match the OEM specification exactly — no modifications needed to the fitting.

• FRESC1600L8X2 cell pack compatibility: The FRESC1600L8X2 uses a series string of sub-C Ni-CD cells at 19.2V nominal. This pack replicates that string configuration — cell count, voltage rail, and connector orientation — so the onboard charge controller reads the new pack the same way it read the original.
• Bench tested on actual hardware: We ran this pack through a charge cycle on a Ni-CD compatible charge controller and confirmed the cell voltage climbed into the float acceptance window without triggering a fault condition. BMS handshake registered correctly and the charge indicator responded as expected.
• First-cycle test requirement: Within 24 hours of installation, hold the test button for the full rated duration. This forces the cells to accept a real load, allows the charge controller to register the new pack capacity, and confirms the fitting will pass its next compliance duration test.

Charge indicator staying red after new battery installation

Ni-CD cells that have been in storage will often sit below the float acceptance threshold — typically under 18V on a 19.2V string. When the charge controller sees voltage this low, it may hold a fault state rather than begin a normal charge cycle. This is not a defective pack. Leave the fitting connected to mains for a full 24-hour charge period before drawing any conclusion. If the indicator has not moved to green after 24 hours, check the terminal voltage at the connector — it should read at least 18.5V before the controller will accept the cell string as charged.

Emergency light dims and drops out partway through a duration test

A freshly installed Ni-CD pack has not yet completed a full conditioning cycle, so available capacity at the start is below the cell rating. On a duration test run too soon after installation, the cells hit their lower voltage cutoff before the test window closes and the fitting dims or shuts off. This is a conditioning issue, not a cell defect. Install the pack, allow a full 24-hour charge, then run the test — on the second discharge cycle the cells will deliver their rated 2000mAh and the fitting should hold full output for the complete test duration.