URA MGN9022 6V Emergency Lighting Replacement Battery 2000mAh

URA MGN9022 / MGN0813 Series — 6V Ni-CD Replacement Battery

This is a 6V, 2000mAh nickel-cadmium replacement battery for URA emergency lighting units including the MGN9022, MGN0813, MGN0519, and 186001 among others. It slots into the fitting where the original cell has degraded past the point of holding charge through a full duration test. Voltage and capacity match the factory specification so the charge controller sees the correct float target.

• MGN9022 / MGN0813 / MGN0519 platform fit: These URA fittings share the same 6V cell format, connector orientation, and trickle-charge circuit. One cell SKU covers the range because the charge board uses a fixed float voltage tied to cell count, not model-specific firmware.
• Bench tested on actual hardware: We cycled this cell through charge and a full load discharge on a URA-compatible test rig. The cell accepted charge within the expected acceptance window and the BMS did not flag an overvoltage or open-circuit fault at any point in the cycle.
• First-cycle conditioning on install: After fitting, hold the test button for the full rated test duration within 24 hours. This lets the charge controller register actual cell capacity before your next scheduled compliance test and prevents a false short-duration fail on the log.

Charge indicator staying red after new battery installation

URA fittings use a float-charge circuit that watches for cell voltage to climb into the acceptance band before switching the indicator green. A new Ni-CD cell fresh from storage often sits below that threshold because self-discharge during warehousing pulls the resting voltage down. The controller interprets this as a fault rather than a healthy new cell. Give the fitting 24 to 48 hours on mains before judging the indicator — once the cell voltage reaches approximately 7.2V across the six sub-cells, the circuit trips green.

Emergency light dims and cuts short during a duration test

This happens when a replacement cell goes straight into a duration test without a prior conditioning charge. The cell has not yet reached full electrochemical capacity, so voltage sags under lamp load faster than it would after a proper charge cycle. This is not a faulty cell — it is an uncharged one. Allow a full 24-hour charge on mains after installation, then run the test button again. A fully charged 6V Ni-CD at 2000mAh should hold the lamp load through the complete rated duration without significant dimming.