Clipsal BP4S 4.8V Emergency Light Replacement Battery 4000mAh

Clipsal LPM70 / LPS70 Series — 4.8V Ni-CD Replacement Battery (BP4S)

This is a 4.8V, 4000mAh Ni-CD replacement cell for Clipsal emergency lighting units including the LPM70, LPM80, LPS70, and LPC118, plus over 20 additional models. It restores backup power to the fitting so the light activates during a mains failure. Voltage and capacity match the OEM specification exactly.

• LPM70 / LPS70 / LPC118 platform compatibility: These fittings share the same 4.8V four-cell Ni-CD architecture and charge controller logic. The BP4S works across this platform because the cell count, voltage rail, and connector pinout are identical — the charge controller does not distinguish between models.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the LPM70 charge controller. The controller accepted the cell at float without a fault condition, and the BMS registered correct cell voltage at all four charge stages.
• First test cycle after installation: Hold the test button for the full rated duration within 24 hours of fitting the new cell. This lets the charge controller register actual cell capacity before the next scheduled compliance test — skipping it can cause the fitting to log a false short-duration fault on the first inspection.

Charge indicator staying red after fitting a new BP4S cell

Ni-CD cells lose voltage during storage and often ship at a resting voltage below the charge controller's float acceptance window. When the controller sees a cell below roughly 4.2V at rest, some Clipsal fittings lock the charge LED red and hold off full charge current until the cell climbs above the threshold. Leave the fitting on mains power for a minimum of 24 hours — the trickle stage will bring the cell voltage up gradually. If the LED has not moved to green after 48 hours, measure across the cell terminals; a reading below 3.8V after 48 hours of trickle indicates a cell fault.

Emergency light dims or cuts out partway through the duration test

A new Ni-CD cell that has not completed at least one full conditioning cycle will not deliver its rated 4000mAh on the first discharge. The cell chemistry needs one complete charge-then-full-discharge pass to align the crystal structure across all four cells. If the fitting dims or drops out before the rated duration on the first test, recharge fully for 24 hours and run the test again. The second test cycle consistently delivers rated duration on this cell in our bench runs.