SATCO/NUVO 25-9000 Emergency Light Replacement Battery 7.4V 2600mAh

SATCO/NUVO Freedom Emergency Fixture — 7.4V Li-ion Replacement Battery (25-9000)

This is a 7.4V, 2600mAh Li-ion replacement battery for the SATCO/NUVO Freedom Emergency Fixture (25-9000). It fits the Freedom series emergency lighting unit used in commercial and residential buildings for backup illumination during mains failure. Voltage and capacity match the original cell exactly — 7.4V nominal, 2600mAh (19.24Wh).

• Freedom Emergency Fixture (25-9000) fitment: The Freedom fixture uses a 7.4V two-cell Li-ion pack with a specific connector and BMS handshake tied to the charge controller. This battery matches that configuration so the charge controller recognises the new cell and enters float charge correctly.
• Bench tested on actual hardware: We ran this cell through a full load cycle on a Freedom-series fixture. The BMS accepted the charge without fault, the charge indicator transitioned from red to green, and the cell delivered rated output under simulated emergency load.
• First test cycle after installation: Hold the test button for the full rated duration within 24 hours of fitting the new battery. This lets the charge controller register the new cell capacity and confirms load acceptance before any scheduled compliance test.

Charge indicator staying red after new battery installation

A replacement cell shipped from storage often arrives at a lower resting voltage than the charge controller's float acceptance window expects. The controller reads this as a fault condition and holds the red indicator rather than entering normal charge. Leave the fixture connected to mains for a full 24-hour conditioning period. After that cycle, the cell voltage should rise into the acceptance window and the indicator should switch to green.

Emergency light failing its duration test after battery replacement

A new Li-ion cell does not always deliver full rated capacity on the very first discharge. The first complete charge-discharge cycle conditions the cell and allows the BMS to map actual capacity. If the fixture cuts out before the rated duration during the first test, run a full 24-hour charge, then repeat the test. A cell that still fails after a second conditioned test cycle should be checked for a resting voltage below 7.0V before any load is applied.