About this replacement
Ektor EV1670 — 4.8V Ni-MH Replacement Battery (ELB-EV1415)
This is a 4.8V, 1800mAh Ni-MH replacement battery for the Ektor EV1670 emergency lighting unit. It replaces OEM part ELB-EV1415. The EV1670 is a maintained or non-maintained emergency exit light, and this cell restores its backup illumination function during mains failure.
- EV1670 and 1415 series fit: Both model references share the same cell format, connector pinout, and charge controller handshake. The 4.8V rail matches the internal charge circuit's float voltage threshold, so no BMS conflict occurs on installation.
- Bench tested on actual hardware: We ran this cell through a full charge cycle and a simulated mains-fail load test. The charge controller accepted the cell without fault, the LED transitioned from charge to standby, and the output voltage held within spec across the discharge phase.
- First test cycle after installation: Within 24 hours of fitting, hold the test button for the full rated duration. This lets the charge controller register the new cell's capacity and confirms the cell accepts load before the next scheduled compliance inspection.
Charge indicator staying red after new battery installation
Emergency lighting charge controllers use a float acceptance window, typically 5.4–5.6V for a 4.8V Ni-MH pack, to confirm the cell is healthy before switching the LED to green. A replacement cell that has been in storage often arrives below this window. The controller sees low resting voltage and holds the fault or charging state. Leave the unit on mains power for a full 24-hour charge cycle before drawing any conclusions about a fault — the cell voltage will rise into the acceptance band and the LED should transition to green.
Emergency light dimming mid-test during a duration check
This happens when the new cell has not completed a full conditioning charge before the test is triggered. Ni-MH cells ship partially discharged, and the first partial charge cycle does not restore full capacity. The light may sustain output for the first few minutes then dim as the cell voltage drops below the driver's minimum input. Run a complete 24-hour charge before performing any duration test. A healthy, fully charged ELB-EV1415 cell should hold output voltage above 4.2V under load throughout the test period.