Bticino L4380/B Emergency Light Compatible Battery 6V 80mAh

Bticino L4380/B & N/NT/L4608 Series — 6V Ni-MH Replacement Battery (23W11)

This is a 6V 80mAh Ni-MH cell that replaces the original 23W11 backup battery in Bticino emergency lighting fixtures. It fits the L4380/B and N/NT/L4608 series units. The cell powers the backup illumination circuit when mains supply is interrupted.

• L4380/B and N/NT/L4608 fitment: Both series use the same 6V Ni-MH cell with identical connector orientation and physical envelope — 31.00 × 20.30 × 16.00mm — so one cell covers all variants without modification.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the Bticino charge controller. The BMS accepted the cell within normal float voltage range, and the charge indicator transitioned to green after a complete conditioning cycle.
• First test cycle after installation: Hold the test button for the full rated duration within 24 hours of fitting. This lets the charge controller register the new cell's capacity and confirms the cell accepts load before the next scheduled compliance inspection.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-MH cell does not arrive at full capacity. Storage discharge means the cell may hold only a fraction of its 80mAh rated capacity on first activation. The Bticino charge controller applies a trickle float charge, but one charge cycle is not always enough to recover full capacity before an immediate test. Allow 24 hours on continuous mains power after installation, then run one complete test cycle before logging the result for compliance records.

Charge indicator staying red after confirmed correct installation

The red fault indicator stays on when the controller detects a cell voltage outside its float acceptance window — common when a replacement cell has been in storage and sits below the controller's minimum threshold. The controller will not transition to green until the cell voltage climbs into the acceptance band, which typically takes one full charge cycle at mains power. If the indicator is still red after 48 hours, check the cell connector is fully seated and the terminal contacts are clean. A brief disconnect and reconnect resets the fault latch on most L4380/B units.