Dual-Lite LXW-13-X2 Replacement Battery 4.8V 800mAh Ni-CD

Dual-Lite LXW-13-X2 Series — 4.8V Ni-CD Replacement Battery (24D679)

This is a 4.8V, 800mAh nickel-cadmium replacement battery for Dual-Lite emergency lighting units. It fits the LXW-13-X2, LXW-15-X2, and LXW-16-X2 models. The cell restores backup lighting function in fittings that activate automatically when mains power fails.

• LXW-13-X2, LXW-15-X2, LXW-16-X2 compatibility: These three models share the same 4.8V charge rail, connector pinout, and trickle-charge controller logic. One cell pack covers all three without any wiring modification.
• Bench tested on actual hardware: We ran this cell through a simulated mains-fail activation. The charge controller accepted the cell within the expected float voltage window and transitioned from charge to standby without fault.
• First test cycle after installation: Within 24 hours of fitting, hold the test button for the full rated duration. This confirms the new cell accepts load and lets the charge controller register the fresh cell before your next scheduled compliance inspection.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-CD cell ships in a partial state of charge. The charge controller in the LXW series uses a trickle charge regime — it takes 24 hours to bring a depleted cell to full capacity. If the fitting is tested immediately after installation, the cell will not deliver its full rated capacity and the light will dim or cut out before the test period ends. Allow a full 24-hour charge before any compliance test. After that conditioning period, the cell should hold load for the rated duration at 4.8V.

Charge indicator staying red after new battery installation

The LXW series charge controller checks cell voltage before entering float mode. A cell that has self-discharged during storage may sit below the controller's acceptance threshold, keeping the indicator red. This is not a faulty cell — it means the controller is still in bulk charge phase. Leave the fitting powered for at least 24 hours without triggering the test button. If the indicator is still red after 48 hours, measure the cell voltage directly: it should read above 4.5V under no load at that point.