Kosnic KBAT2200 7.2V Emergency Light Compatible Battery 2600mAh

Kosnic KTC27EME-DD / UEM CEC03LBL/S — 7.2V Li-ion Replacement Battery (KBAT2200)

This 7.2V 2600mAh Li-ion battery replaces the KBAT2200 cell in Kosnic KTC27EME-DD and UEM CEC03LBL/S emergency lighting units. These are maintained emergency exit and evacuation lights — the battery sustains illumination when mains power fails. Capacity is 18.72Wh as tested.

• KTC27EME-DD and CEC03LBL/S compatibility: Both fittings run the same 7.2V charge rail and use the same KBAT2200 cell format with an identical connector and BMS handshake. A cell outside that voltage spec will not be accepted by the charge controller and the fitting will stay in fault state.
• Bench tested on actual hardware: We ran this cell through a full charge cycle on a KTC27EME-DD fitting. The BMS accepted the cell without fault, the charge indicator moved from red to green, and the cell held voltage under simulated mains-fail load without early cutoff.
• 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 your next scheduled compliance test. Skip this step and the fitting may log a short-duration fault on the next automated test.

Emergency light failing its duration test after battery replacement

A new cell shipped from storage typically arrives at a partial state of charge — not flat, but not fully conditioned either. The charge controller in the KTC27EME-DD uses the first full charge cycle to calibrate what the cell can deliver. If a compliance test runs before that first full cycle completes, the fitting may cut out early and log a duration failure even though the cell is not faulty. Install the battery, allow a full 24-hour charge, then run one manual test cycle before relying on automated tests. After that cycle the controller has a accurate baseline and duration tests should pass.

Charge indicator staying red after new battery installation

The KTC27EME-DD charge controller uses a float acceptance window — if incoming cell voltage is outside that range after prolonged storage, the controller flags a fault and holds the red indicator rather than entering normal charge mode. Remove the battery, leave it disconnected for 60 seconds, then reconnect. This resets the controller's acceptance check. If the indicator stays red after a second reconnect, measure the cell's open-circuit voltage with a multimeter — a reading below 6.0V indicates deep discharge and the cell will need a slow pre-charge before the controller will accept it.