URA 117319 Emergency Lighting Replacement Battery 2.4V 2000mAh

URA 117319 Security Block — 2.4V Ni-Cd Replacement Battery

This is a 2.4V, 2000mAh Ni-Cd replacement battery for the URA 117319 security block emergency lighting unit. It also fits the 117318, 2 HRMT 23/43, and 2 KMRT 23/43 fittings. When the original cell degrades, the fitting fails its duration test — this cell restores backup illumination capacity.

• 117319, 117318, 2 HRMT 23/43, 2 KMRT 23/43 compatibility: These URA fittings share a 2.4V charge rail and the same physical cell format — two sub-C Ni-Cd cells in series. The charge controller float voltage and trickle rate are matched to this chemistry, so no BMS handshake is required beyond cell presence and voltage.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on a 2.4V Ni-Cd charge controller. The cell accepted charge correctly, reached rated terminal voltage, and held load voltage within spec during a simulated duration draw. No premature cutoff was observed.
• First-fit test cycle for emergency compliance: Within 24 hours of installation, hold the fitting's test button for the full rated duration. A freshly installed Ni-Cd cell may not yet be at full capacity from storage — one complete discharge-recharge cycle lets the charge controller register the new cell before your next scheduled compliance inspection.

Charge indicator staying red after new battery installation

URA security block fittings use a float-charge controller that checks incoming cell voltage before switching to green. A Ni-Cd cell that has sat in storage for months can drop below the controller's acceptance threshold — typically under 2.0V open circuit. The controller sees this low voltage and holds a fast-charge state, keeping the indicator red. Leave the fitting powered for 12–24 hours; once the cell climbs above roughly 2.2V, the controller will shift to float and the indicator should switch to green.

Emergency light dims and cuts short during a duration test

This happens when a new cell has not completed its first full conditioning cycle. Ni-Cd cells shipped from storage deliver reduced capacity on the initial discharge — often 60–70% of rated capacity. The fitting's lamp draws sustained current, and the under-conditioned cell sags early. Run one complete manual test cycle immediately after installation, then allow a full 24-hour recharge before treating the result as a valid compliance test. Rated capacity of 2000mAh is achieved reliably from the second cycle onward.