About this replacement
SATCO/NUVO Freedom Emergency Fixture — 11.1V Li-ion Replacement Battery (25-9002)
This 11.1V, 2600mAh Li-ion battery pack replaces the backup cell in the SATCO/NUVO Freedom Emergency Fixture (25-9002). It restores the fixture's ability to maintain illumination during mains failure events. Capacity is rated at 28.86Wh — use the figure from the product data, not the original label if faded.
- Freedom 25-9002 fit: The 25-9002 fixture uses an 11.1V three-cell Li-ion pack with a specific connector orientation and BMS handshake that confirms cell presence to the charge controller — this pack matches that configuration exactly.
- Bench tested on actual hardware: We ran this cell through a full charge cycle and simulated mains dropout. The BMS held output voltage within spec under load, and the charge controller transitioned from bulk charge to float without flagging a fault.
- First test cycle after installation: Perform a manual test within 24 hours of fitting by holding the test button for the full rated duration. This lets the charge controller register the new cell's capacity before your next scheduled compliance test.
Charge indicator staying red after new battery installation
A freshly shipped Li-ion pack often sits at a storage voltage below the float acceptance window the Freedom fixture's charge controller expects. If the cell voltage is too low on connection, the controller can flag a fault rather than begin charging. Leave the fixture connected to mains for a minimum of 24 hours before concluding the battery is faulty. If the indicator is still red after 24 hours, measure the pack voltage at the connector — a reading below 9V indicates the cell discharged past the BMS recovery threshold during storage.
Emergency light dimming partway through a duration test
A new cell that has not completed one full conditioning cycle will not deliver its rated 28.86Wh on the first activation. The charge controller may have registered partial capacity, causing the fixture to dim or cut output before the test duration completes. This is not a defective battery — it is an uncharged one. Run the fixture on mains charge for a full 24 hours, then repeat the duration test. Rated output should hold across the full test period once the cell has reached a complete charge state above 12.4V.