Kaufel 850.0060 AA/4 Replacement Battery 4.8V 800mAh Ni-Cd

Kaufel 850.0060 AA/4 — 4.8V Ni-Cd Replacement Battery (BGN800-4DWP-PRB830EC)

This is a 4.8V, 800mAh Ni-Cd replacement battery for the Kaufel 850.0060 AA/4 emergency lighting unit. It replaces OEM part BGN800-4DWP-PRB830EC directly. The cell pack restores the unit's ability to activate on mains failure and sustain illumination through the rated test duration.

• 850.0060 AA/4 fitment: The 850.0060 AA/4 uses a 4-cell Ni-Cd pack at 4.8V nominal to match the charge controller's float voltage and connector pinout. Swapping chemistry or voltage trips the charge circuit and the fitting logs a fault.
• Bench tested on actual hardware: We cycled this pack through a full charge and load test. The BMS accepted charge within spec, held voltage under emergency load, and showed no premature cutoff across the test window.
• Post-installation test cycle: Within 24 hours of fitting this battery, hold the test button for the full rated duration. This confirms the new cell accepts load and lets the charge controller register the new capacity before your next scheduled compliance inspection.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-Cd pack does not always deliver its full rated capacity on the first test. Storage time partially depletes the cells, and the charge controller needs at least one complete charge cycle to top the pack to true capacity. If the fitting cuts out before the required duration, it does not mean the battery is faulty. Run the fitting on charge for a minimum of 24 hours, then repeat the duration test — the pack should hold load through the full rated period at that point.

Charge indicator staying red after fitting a new battery

Some 850.0060 AA/4 fittings will hold a red or fault LED even after a confirmed good installation. This happens when the new cell arrives from storage at a voltage outside the charge controller's float acceptance window. The controller sees an out-of-range voltage and stays in fault mode rather than switching to trickle charge. Leave the fitting on mains power for a full 24-hour charge cycle — the cell voltage will climb into the acceptance band and the indicator should shift to green. If it does not clear after 24 hours, check the connector seating and confirm cell polarity against the original orientation.