Genlyte 52-0185 Emergency Lighting Replacement Battery 3.6V 800mAh

Genlyte 52-0185 / 62-0185 / OSA060AA — 3.6V Ni-CD Replacement Battery

This is a 3.6V, 800mAh nickel-cadmium cell for Genlyte emergency lighting units fitted in commercial and industrial buildings. It fits the 52-0185, 62-0185, and OSA060AA models. When mains power fails, this battery activates the lamp circuit and holds the fitting operational for the rated duration.

• 52-0185, 62-0185, and OSA060AA compatibility: These three Genlyte models share the same 3.6V single-cell NiCd format, charge controller float voltage, and bayonet-style cell connector. Swapping between them does not change the installation procedure.
• Bench tested on actual hardware: We ran a full charge cycle on a 62-0185 fitting and confirmed the charge controller accepted the cell without fault. The BMS completed float transition within the expected window, and the lamp circuit fired correctly on a simulated mains-loss event.
• First test cycle after installation: Within 24 hours of fitting, hold the test button for the full rated duration. NiCd cells fresh from storage have not yet been conditioned — running one full discharge-to-cutoff cycle lets the charge controller register actual cell capacity before your next scheduled compliance test.

Charge indicator staying red after new battery installation

Genlyte charge controllers compare incoming cell voltage against a narrow float acceptance window. A cell shipped at storage voltage — typically 3.2–3.4V — can sit below that window and trigger a persistent red fault state. The controller has not failed; it is waiting for the cell to reach threshold before switching to green. Leave the fitting on mains power for 24 hours. If the indicator has not shifted to green by then, check terminal contact and confirm cell polarity is correctly oriented.

Emergency light dims and cuts short during a duration test

A cell that has not completed its first conditioning cycle delivers less usable capacity than its 800mAh rating suggests. The lamp draws full load, the cell voltage drops faster than expected, and the fitting cuts the lamp circuit early — failing the test on paper even though the cell is not defective. This is not a fault with the battery or the fitting. Run one full charge cycle on mains before the next compliance test. After that first cycle, rated capacity is available and the fitting should hold lamp output for the full duration.