About this replacement
Kaufel 850.0034 — 6V Ni-CD Replacement Battery (BGN1300-5AWP-3202EC)
This is a 6V, 1500mAh Ni-CD battery replacing part number BGN1300-5AWP-3202EC in the Kaufel 850.0034 emergency lighting unit. It powers the backup lighting circuit during mains failure, keeping exit signs and safety lights active when the building loses power. Correct voltage and chemistry match are critical in emergency lighting — this cell meets both.
- Kaufel 850.0034 fitment: The 850.0034 uses a dedicated charge controller that floats at 6V and expects Ni-CD chemistry. Fitting a different chemistry — Li-ion or NiMH — confuses the charge curve and can trigger a permanent fault state on the controller board.
- Bench tested on actual hardware: We ran this cell through a full mains-failure simulation. The BMS accepted charge within the float window, the charge indicator moved to green within the expected cycle, and the cell held voltage under load without sag or cutoff.
- First test cycle after installation: Perform a manual test within 24 hours of fitting by holding the test button for the full rated duration. This lets the charge controller register the new cell and confirms the battery accepts load before your next scheduled compliance inspection.
Emergency light failing its duration test after battery replacement
A new Ni-CD cell shipped from storage carries a partial charge — it has not yet completed a full conditioning cycle. When the 850.0034 runs a duration test immediately after installation, the cell may cut out early because it never reached full capacity before the test began. This is not a faulty cell. One full charge cycle — typically 24 hours on float — brings the cell to rated capacity. Run the duration test after that cycle and the light should hold for the full period.
Charge indicator staying red after confirmed correct installation
Some 850.0034 fittings latch a fault LED in firmware and do not reset it automatically when a new cell is detected. The controller checks cell voltage at startup — if the incoming voltage sits outside the float acceptance window from long storage, the fault flag stays set. First, confirm the cell is reading at or above 5.4V with a multimeter across the terminals. If it is, locate the reset procedure in the fitting's service manual — most Kaufel units require holding the test button for 10 seconds with mains power present to clear a latched fault.