Hochiki EL-BAT450 Emergency Light Compatible Battery 7.4V

Hochiki Firescape Luminaires — 7.4V Li-Polymer Replacement Battery (EL-BAT450)

This is a 7.4V, 700mAh lithium-polymer replacement for the Hochiki EL-BAT450 battery pack. It fits Firescape luminaires and exit signs that rely on an internal battery to maintain emergency illumination during mains failure. Voltage and cell format match the original pack exactly.

• Firescape luminaire fitment: Hochiki Firescape units use a compact Li-Polymer cell at 7.4V nominal to feed the driver circuit during mains outage. The flat pouch format and connector position must match the original — this cell meets both requirements. No adaptation is needed at the fitting.
• Bench tested on actual hardware: We ran this cell through a simulated mains-fail cycle. The charge controller accepted the new cell without fault, the BMS held voltage above the low-cell cutoff through the full load cycle, and the fitting returned to float charge cleanly afterward.
• First-cycle activation on emergency fittings: After installation, hold the test button for the full rated test duration within 24 hours. This lets the charge controller register the new cell's capacity and clears any residual fault state before your next scheduled compliance test.

Emergency light failing its duration test after battery replacement

A freshly installed Li-Polymer cell ships at partial state of charge — typically 40–60% — to comply with transport safety rules. If the fitting goes straight into a duration test without a full prior charge cycle, the cell will exhaust before the rated test window closes. The charge controller needs at least one full charge-to-float cycle before the cell can deliver its rated 5.18Wh under load. Allow 24 hours on mains before running any compliance duration test on a new cell.

Charge indicator staying red after new battery installation

Some Hochiki Firescape charge controllers check incoming cell voltage before entering float mode. A cell stored for several months can drop below the acceptance window — typically under 6.8V — which keeps the controller in fault state rather than initiating charge. Reconnect the cell, wait two minutes, then disconnect and reconnect again; this re-triggers the controller's voltage-sense routine. If the cell reads above 6.8V on a multimeter and the fault LED persists, press and hold the test button for three seconds to manually reset the fault latch.