Legrand HB00095TA 4.8V Emergency Lighting Compatible Battery

Legrand 61884 / 9342819 / H95400 — 4.8V Ni-CD Replacement Battery (HB00095TA)

This is a 4.8V, 2000mAh Ni-CD replacement battery for the Legrand 61884 emergency lighting unit, also cross-referencing models 9342819 and H95400. It replaces OEM part HB00095TA. The battery powers the fitting during mains failure, supplying backup illumination for evacuation compliance.

• 61884, 9342819 and H95400 compatibility: All three models share the same 4.8V cell configuration, connector pinout, and charge controller circuit. A single replacement cell services all three without modification.
• Bench tested on actual hardware: We ran this cell through a full charge cycle and mains-failure simulation. The charge controller accepted the cell, float charge stabilised correctly, and the fitting switched to battery within the expected response window.
• First test cycle after installation: Within 24 hours of fitting the new cell, hold the test button for the full rated test duration. This lets the charge controller register the new cell's capacity and confirms the cell accepts a load — critical before any scheduled compliance inspection.

Charge indicator staying red after new battery installation

Ni-CD cells shipped from storage often sit at a lower resting voltage than the fitting's float acceptance window expects. When the controller sees an unfamiliar voltage on the terminals, it holds the fault or charge state rather than switching to green. This is not a faulty cell. Leave the fitting on mains power for 24 hours — the controller will complete its charge cycle and the indicator should move to green once the cell reaches approximately 5.4–5.6V fully charged across the four cells.

Emergency light dims partway through a duration test

A cell that has not completed one full conditioning cycle will not deliver its rated 2000mAh on the first discharge. The output voltage drops below the fitting's low-voltage cutoff sooner than expected, and the light dims or cuts out before the test duration ends. The fix is a 24-hour full charge before the test, followed by one complete discharge cycle. After one full charge-discharge cycle, the cell reaches rated capacity and the fitting will sustain output for the full duration.