Lite-Plan 4/CD45/S/NECA 4.8V Emergency Light Replacement Battery

Lite-Plan 4/CD45/S/NECA — 4.8V Ni-CD Replacement Battery (98100231)

This is a 4.8V, 4000mAh nickel-cadmium battery for the Lite-Plan 4/CD45/S/NECA emergency lighting unit (OEM part 98100231). It slots directly into the fitting to restore backup illumination when mains power fails. At 19.2Wh, it meets the energy requirement for sustained emergency lighting duration under standard compliance schedules.

• 4/CD45/S/NECA fitting compatibility: This unit runs a 4.8V NiCd cell string matched to the charge controller's float voltage and connector pinout. Swapping chemistry or voltage — even slightly — throws the charge controller off its acceptance window and triggers a permanent fault state.
• Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence on the 4/CD45/S/NECA controller. The BMS accepted the cell without fault, held float charge correctly, and the capacity measured within spec across two discharge passes.
• First test cycle after installation: Hold the test button for the full rated duration within 24 hours of fitting this battery. This forces the charge controller to register the new cell's capacity baseline before any scheduled compliance test runs automatically. Skip this step and your first duration test may log a short-run fault against a cell that was actually fine.

Charge indicator staying red after fitting a new battery

NiCd cells ship in a partially discharged state — often below the 4.8V float acceptance threshold the 4/CD45/S/NECA controller expects to see on a fresh install. The controller interprets this low open-circuit voltage as a fault rather than a new cell. Most fittings resolve this after 12–24 hours on charge as the cell climbs back into the acceptance window. If the indicator stays red past 24 hours, confirm cell voltage directly across the terminals — it should read 4.8V or above before the controller flips to green.

Emergency light dims partway through its duration test

A new NiCd cell needs at least one full charge-discharge cycle before it delivers rated capacity. If you run a duration test before that conditioning cycle completes, the cell hits voltage cutoff early and the lamp dims or drops out — even though nothing is wrong with the battery. This is not a faulty cell. Charge the unit for a full 24 hours, then run a manual test by holding the test button through the entire rated duration. After that cycle, the cell will meet the stamped capacity on subsequent tests.