DOTLUX EXITtop 3682 Compatible Battery 3.6V 2000mAh Ni-CD

DOTLUX EXITtop Series — 3.6V Ni-CD Replacement Battery (3682)

This is a 3.6V, 2000mAh Ni-CD cell pack for the DOTLUX EXITtop emergency exit light (Part No 3682). It fits the EXITtop fitting and the 3679 model. Voltage and capacity match the original cell specification exactly.

• EXITtop and 3679 compatibility: Both models share the same charge controller circuit, cell voltage rail, and connector format. The 3.6V trickle charge profile and physical cell dimensions are identical across the two fittings, so one cell pack covers both.
• Bench tested on actual hardware: We ran this cell on the EXITtop charge board and confirmed the controller moved from bulk charge to float without triggering a fault LED. The BMS accepted the new cell without requiring a manual reset on the unit we tested.
• First-cycle test protocol: Within 24 hours of installation, hold the test button for the full rated duration. This confirms the cell accepts load under emergency draw conditions and lets the charge controller register the new cell capacity before any scheduled compliance inspection.

Charge indicator staying red after new battery installation

A Ni-CD cell shipped from storage can sit at 1.0–1.1V per cell, which falls below the float acceptance window on the EXITtop charge controller. When the controller sees that low resting voltage, it holds the fault or charge LED red rather than advancing to green. Leave the fitting powered for 12–24 hours undisturbed. Once the cell climbs past the acceptance threshold — typically around 1.2V per cell, 3.6V total — the controller will switch the indicator to green on its own.

Emergency light dims partway through a duration test after battery replacement

A new Ni-CD cell that has not completed one full charge-discharge cycle will not deliver its rated 2000mAh on the first activation. The cell surface charge looks full, but usable capacity is below rated until the first proper cycle conditions the plates. If the light dims or cuts out before the end of the test duration, recharge for a full 24 hours and run the test again. One complete cycle is enough to bring the cell to rated capacity for compliance testing.