Beghelli 415097000 Emergency Light Ni-MH Compatible Battery 3.6V 1500mAh

Beghelli 415097000 — 3.6V Ni-MH Replacement Battery (98100202.R.001)

This 3.6V, 1500mAh Ni-MH cell replaces the backup battery pack in the Beghelli 415097000 emergency lighting unit. It powers the fitting during mains failure, keeping exit signs and evacuation pathways illuminated. Dimensions are 51.70 × 42.50 × 14.60mm — confirm these against your existing cell before ordering.

• 415097000 fitting compatibility: The Beghelli 415097000 uses a low-voltage Ni-MH pack on a float charge circuit. The 3.6V nominal rail and cell footprint must match exactly — the charge controller is calibrated to this chemistry and will not correctly manage Li-ion or NiCd substitutes.
• Bench tested on actual hardware: We ran this cell through a full charge cycle and a simulated mains-failure discharge. The BMS accepted charge without thermal event, and the cell held load through a complete rated-duration draw without voltage collapse.
• First-cycle activation on emergency fittings: Hold the test button for the full rated duration within 24 hours of installation. This forces one complete discharge–recharge cycle, allowing the charge controller to register the new cell's capacity before your next compliance test window.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-MH cell ships in a partially discharged state — typically 30–50% of rated capacity. The charge controller in the 415097000 begins float topping the cell immediately, but float current alone takes 24–48 hours to bring a depleted cell to full charge. Running a duration test too soon means the cell exhausts before the rated period ends, which reads as a test failure on paper but is not a fault with the battery. Allow a full 48-hour charge period after installation, then retest. The cell should reach and hold nominal voltage above 3.2V through the rated discharge.

Charge indicator staying red after new battery installation

Storage voltage on a new Ni-MH cell can sit outside the float acceptance window the 415097000's charge controller expects — particularly if the cell has been warehoused for several months. The controller interprets this as a fault rather than a low cell and holds the fault LED red. Disconnect the battery connector, wait 10 seconds, then reconnect to force the controller to re-read cell voltage. If the LED shifts to amber or green within a few minutes, the cell is charging normally; if red persists beyond 30 minutes, measure cell voltage directly — it should read above 3.0V at rest.