Lithonia ELB0300 Compatible Battery 1.2V 1200mAh Ni-CD

Lithonia ELB0300 / ELB0604N Series — 1.2V Ni-Cd Replacement Battery (CUSTOM-128)

This is a 1.2V, 1200mAh Ni-Cd cell for Lithonia emergency lighting units. It fits the ELB0300, ELB1P201N1, NIC002, and ELB0604N fittings — the same cell services all four because they share an identical voltage rail and connector footprint. Dimensions are 43.20 × 19.40 × 17.00mm; confirm those against the existing cell before ordering.

• ELB0300 / ELB0604N platform compatibility: These four models use the same charge controller circuit and float voltage target. Swapping one cell type across all of them keeps your replacement stock simple and avoids mismatches during site maintenance.
• Bench tested on actual hardware: We cycled this cell through a full discharge-to-cutoff and recharge sequence on a Lithonia ELB0300 unit. The charge controller accepted the cell without fault, floated correctly at 1.4V, and the fault LED cleared after one complete cycle.
• First-install test cycle: 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 before the next scheduled compliance inspection — skipping it risks a failed duration test at the worst possible time.

Charge indicator staying red after fitting a new cell

Lithonia charge controllers use a float acceptance window to confirm a valid cell is present. A cell that has sat in storage can arrive with a resting voltage below that window — typically under 1.0V — which the controller reads as a fault rather than a dischargeable cell. The controller will not switch to green until the cell voltage climbs into the acceptance band during the initial charge cycle. Leave the fitting on mains power for a full 24-hour charge before drawing any conclusions; most cells recover to an acceptable resting voltage of around 1.2V within that window.

Emergency light dims noticeably partway through a duration test

This happens when a newly installed cell has not completed its first full conditioning charge before the test is run. Ni-Cd cells need at least one uninterrupted charge cycle to reach rated capacity — the 1200mAh figure assumes a fully conditioned cell. A partially charged cell will deliver adequate lumens at the start of a test but sag as internal resistance climbs under sustained load. Charge the unit for a minimum of 24 hours on mains, then run the duration test; cell voltage under load should hold above 1.0V throughout.