BAES OVA TD310632 Emergency Light Replacement Battery 7.2V 1600mAh

BAES OVA TD310632 / FLUO EVAC — 7.2V Ni-Cd Replacement Battery (329045490)

This is a 7.2V, 1600mAh Ni-Cd replacement battery for the BAES OVA TD310632 and FLUO EVAC emergency lighting units. These fittings provide maintained or non-maintained illumination during mains failure in commercial and public buildings. Voltage and capacity match the OEM cell string exactly, so the charge controller sees no difference at float.

• OVA TD310632 and FLUO EVAC compatibility: Both fittings share the same 7.2V cell architecture and charge controller logic. The 329045490 cell pack fits the same mechanical bay, uses the same connector orientation, and presents the correct voltage profile for the built-in trickle charge circuit to accept without fault.
• Bench tested on actual hardware: We ran this pack through a simulated mains-fail discharge cycle. The BMS held load without voltage collapse, and the charge controller returned to green float status within the standard 24-hour recharge window after full discharge.
• 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 capacity and clears any residual storage state from the cell before your next scheduled compliance inspection.

Charge indicator staying red after new battery installation

Ni-Cd cells lose voltage during storage — a pack sitting in a warehouse for several months can drop well below the float acceptance window the charge controller expects. When the controller sees an incoming voltage that reads too low, it flags a fault instead of beginning the charge cycle. The fix is a slow recovery charge: some fittings have a manual reset button; others require a brief disconnect and reconnect of the cell pack to prompt the controller to re-poll the cell voltage. Once the pack climbs above approximately 6.5V on the controller's sense line, the indicator will shift from red to the charging phase.

Emergency light fails its duration test after battery replacement

A fresh Ni-Cd cell rarely delivers full rated capacity on its first discharge cycle — this is a known characteristic of the chemistry, not a defective pack. The cell needs one complete charge-discharge cycle to reach the capacity specified on the label. If the fitting cuts out before the required test duration on first use, complete a full manual test cycle, allow 24 hours for the charge controller to restore the pack to float voltage, then repeat the duration test. The second test will reflect true rated capacity.