About this replacement
LumaPro 6CGL9 Series — 4.8V Ni-CD Replacement Battery (48H466)
This is a 4.8V, 800mAh nickel-cadmium replacement cell for LumaPro emergency lighting units. It fits the 6CGL9, 6CGN0, 6CGN5, and 6CGN6 models, along with four additional units in the same family. The cell slots into the fitting's charge circuit and provides backup illumination when mains power fails.
- 6CGL9 family compatibility: These models share the same 4.8V charge rail, cell footprint (49.50 × 28.30 × 28.30mm), and connector orientation. The charge controller in each unit expects the same float voltage, so one cell specification covers the entire group without modification.
- Bench tested on actual hardware: We ran this cell through a full charge cycle and a load test simulating mains-failure activation. The BMS accepted charge within spec and the cell sustained voltage through the test duration without dropping below the fitting's low-voltage cutoff threshold.
- First-cycle test requirement: Within 24 hours of installation, hold the fitting's test button for the full rated duration. This lets the charge controller register the new cell and confirms the cell accepts load before your next scheduled compliance inspection. Skipping this step can cause a false fail on the first formal test.
Charge indicator staying red after new battery installation
Ni-CD cells lose voltage during storage. If the cell voltage sits below the fitting's float acceptance window when installed, the charge controller reads it as a fault rather than a depleted cell. Most LumaPro units in this series need the cell to reach approximately 4.6–4.8V before the indicator switches to green. Leave the fitting connected to mains for 24 hours after installation. If the indicator remains red after that period, check that the connector is fully seated and that no pins are bent at the terminal block.
Emergency light failing its duration test after battery replacement
A new Ni-CD cell does not reach full rated capacity on its first charge cycle. Running a compliance duration test the same day as installation almost always produces a short result — not because the cell is faulty, but because it hasn't completed a full conditioning cycle. Allow at least one full 24-hour charge before the formal test. If the light still falls short of the rated duration after conditioning, check the fitting's trickle charge current against the cell's 800mAh rating — a charge current below 80mA will under-condition the cell.