Kaufel 850.0095 Emergency Light Ni-CD Compatible Battery 2.4V 800mAh

Kaufel 850.0095 — 2.4V Ni-Cd Replacement Battery (850.0095)

This is a 2.4V, 800mAh Ni-Cd cell for Kaufel emergency lighting units carrying part number 850.0095. It replaces the internal battery pack in emergency exit signs and backup lighting fixtures that lose charge capacity over time. Voltage and chemistry match the original specification exactly.

• Kaufel 850.0095 fitting compatibility: These fittings run a trickle-charge circuit tuned to Ni-Cd at 2.4V. The charge controller applies a fixed float voltage — swapping to a different chemistry or voltage tier trips the charge fault logic and the unit never reaches ready state.
• Bench tested on actual hardware: We cycled the cell through a full charge-discharge sequence and confirmed the BMS accepted the cell without a fault flag. Charge acceptance was within expected range for a fresh Ni-Cd at this capacity.
• First-install test cycle: Within 24 hours of fitting, hold the test button for the full rated duration. This forces a load cycle that lets the charge controller register the new cell and sets the baseline before any scheduled compliance inspection.

Charge indicator staying red after new battery installation

A Kaufel fitting that has sat unpowered — on a shelf or during transit — stores the replacement cell at a low resting voltage. When the charge controller first sees the cell, it checks voltage against its float acceptance window. A cell sitting below roughly 2.0V can fall outside that window and trigger a continuous fault state. Leave the fitting powered for 12 to 24 hours without pressing the test button. The controller will trickle the cell up to a voltage it recognises, then switch to normal charge mode and clear the red indicator.

Emergency light failing its duration test after battery replacement

A fresh Ni-Cd cell does not deliver full rated capacity on its first discharge. The electrochemical structure needs at least one complete charge-discharge cycle to reach the 800mAh figure. If a compliance test runs immediately after installation, the light will dim or cut out before the required duration ends — not because the cell is faulty, but because it has not been conditioned. Charge the fitting for a full 24 hours, then run one complete manual test cycle before the next formal inspection.