Schneider 329045280 Replacement Battery 4.8V 2000mAh

Schneider 329045280 Series — 4.8V Ni-CD Replacement Battery (OVA51016E)

This is a 4.8V, 2000mAh Ni-CD replacement battery for Schneider emergency lighting units including models 329045280, 805045, TD310433, and 806089. It slots into the fitting as a direct cell swap and connects to the onboard charge controller. Capacity matches the original OVA51016E specification at 9.6Wh.

• Shared across the 329045280 platform: These fittings use the same 4.8V cell pack, connector pinout, and charge controller logic. One cell format covers the full model range listed above, so the charge acceptance curve behaves identically across units.
• Bench tested on actual hardware: We ran this cell through a simulated mains-failure activation and monitored charge controller response. The BMS accepted the float charge without fault flags and the cell voltage held stable under load.
• First-cycle conditioning on emergency lighting: Perform a full manual test within 24 hours of installation. Hold the test button for the complete rated duration. This lets the charge controller log the new cell capacity before any scheduled compliance test runs against it.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-CD cell arrives partially discharged from storage. The charge controller in these Schneider fittings begins trickle charging immediately, but the cell needs at least one full charge cycle before it reaches rated capacity. If a compliance test runs within the first 24 hours, the cell will cut out early — not because it is faulty, but because it hasn't yet been conditioned. Allow a full 24-hour charge after installation, then run a manual test before the next scheduled audit. The cell should then hold the rated discharge duration.

Charge indicator staying red after new battery installation

Some Schneider fittings lock a fault LED state in firmware and don't auto-clear it when a new cell is detected. If the charge indicator stays red after installation and the cell voltage reads above 4.5V at the terminals, the fault is a controller flag — not a dead cell. Locate the reset procedure in the fitting's service manual, which is typically a timed button press sequence or a brief mains interruption followed by reconnection. On most units in this range, cycling mains power with the new cell seated will clear the fault and shift the indicator to amber or green within 30 seconds.