NEB-NiCAD4 Nora Lighting Emergency Light Compatible Battery 3.6V 2000mAh

Nora Lighting NE-602LED / NE-612LED — 3.6V Ni-MH Replacement Battery (NEB-NiCAD4 / NEB-NICAD8)

This is a 3.6V, 2000mAh Ni-MH battery for the Nora Lighting NE-602LED and NE-612LED emergency lighting fixtures. It slots into the battery compartment in place of the original NEB-NiCAD4 or NEB-NICAD8 cell. When mains power fails, this cell powers the LED array and keeps the fixture live for the full rated test duration.

• NE-602LED and NE-612LED shared cell: Both fixtures use the same 3.6V single-cell bay, charge controller circuit, and connector pinout — one battery fits both. The charge controller monitors cell voltage at float, so the replacement cell must match the 3.6V nominal rating exactly.
• Bench tested on actual hardware: We ran this cell through a full simulated mains-loss cycle on the NE-602LED. The charge controller accepted the cell without fault, the LED array activated immediately on mains removal, and the BMS held discharge within spec across the full test window.
• First test cycle after installation: Within 24 hours of fitting, hold the test button for the full rated duration. This lets the charge controller register the new cell's capacity and confirm load acceptance before any scheduled compliance inspection. Skipping this step can cause the fixture to underperform on a formal duration test.

Charge indicator staying red after new battery installation

The NE-602LED and NE-612LED charge controllers use cell voltage to decide whether to switch from bulk charge to float. A new Ni-MH cell shipped from storage may present a resting voltage low enough that the controller stays in fault or extended-charge mode, holding the red LED on. This is not a faulty battery or a faulty fitting. Allow 12–24 hours of uninterrupted mains power for the controller to bring the cell up to its float threshold, typically around 4.1–4.3V for a 3.6V Ni-MH cell. If the indicator is still red after 24 hours, check that the connector is fully seated and pins are making clean contact.

Emergency light dims or cuts short during a duration test

If the fixture dims noticeably partway through a test cycle, the cell has not yet reached its rated 2000mAh capacity — this happens on the first one or two discharge cycles after a period of storage. Ni-MH cells lose capacity through self-discharge during storage and recover it across several full charge-discharge cycles. Run one complete manual test cycle, then return the fixture to mains charge for a full 24 hours before re-testing. After that conditioning cycle, cell output should hold steady across the full test duration at 3.6V nominal.