Teig 850069 Replacement Battery 1.2V 1500mAh Ni-CD

Teig 850069 — 1.2V Ni-CD Replacement Battery

This is a 1.2V 1500mAh Ni-CD replacement cell for the Teig 850069 emergency lighting unit. It restores backup illumination function in fittings that activate on mains failure. Capacity is 1500mAh (1.8Wh), matching the original cell specification.

• Teig 850069 fitting compatibility: The 850069 uses a low-voltage Ni-CD charge circuit with a fixed trickle rate matched to 1.2V cell chemistry. Swapping to a different chemistry or voltage disrupts the charge controller's float threshold and will trigger a fault state on the fitting.
• Bench tested on actual hardware: We ran the cell through a full charge cycle and applied a load test simulating the fitting's lamp draw. The BMS accepted the cell without fault and held voltage above the cutoff threshold through the full test duration.
• First-cycle conditioning on the 850069: Hold the test button for the full rated duration within 24 hours of installation. This forces the charge controller to register the new cell's capacity and resets its internal state before your next scheduled compliance test. Skip this step and the fitting may log a short-duration fault on the first formal inspection.

Charge indicator staying red after new cell installation in the 850069

A fresh Ni-CD cell shipped from storage typically rests at a lower voltage than the float level the 850069's charge controller expects. When the controller reads that low resting voltage, it holds the fault or charging indicator red rather than transitioning to green. This is not a wiring fault — it is the controller waiting for the cell to reach its acceptance window. Leave the fitting on mains power for 24 hours and the indicator should shift to green once cell voltage climbs above approximately 1.25V. If it does not clear after 24 hours, check the connector seating and confirm polarity.

Emergency light dims partway through the duration test after replacement

A new Ni-CD cell that has not completed a full conditioning cycle delivers less usable capacity than its rated 1500mAh on the first discharge. The cell has not yet fully formed its internal charge structure, so voltage sags earlier under lamp load — output drops and the fitting dims before the test duration ends. This is a one-cycle issue, not a faulty cell. Recharge the fitting fully, then run one complete test cycle using the manual test button before submitting the fitting for compliance inspection. After that first full cycle the cell should deliver its rated capacity consistently.