About this replacement
Philips Bodine 442240938971 — 10.8V Li-ion Replacement Battery (INR18650-3S1P)
This is a 10.8V, 2600mAh Li-ion battery pack for the Philips Bodine 442240938971 emergency lighting unit. It slots into the fitting to restore backup illumination during mains failure. Voltage and capacity match the original INR18650-3S1P specification exactly.
- Bodine 442240938971 compatibility: The 442240938971 uses a 3S1P 18650 cell arrangement at 10.8V nominal. The charge controller in this fitting expects that voltage rail and the matching connector orientation — a different cell count trips a fault state on the board.
- Bench tested on actual hardware: We ran the pack through a simulated mains-loss cycle. The BMS accepted charge from the fitting's trickle controller, held voltage through a full load discharge, and the protection circuit tripped correctly at the low-voltage cutoff threshold without locking out the charge path.
- First test cycle after installation: Within 24 hours of fitting the battery, hold the test button for the full rated duration. This confirms the cell accepts load and lets the charge controller register the new pack before your next scheduled compliance test. Skipping this step can cause the fitting to underreport available capacity.
Charge indicator staying red after new battery installation
A freshly shipped Li-ion pack often sits at a storage voltage between 3.6V and 3.8V per cell — roughly 10.8V to 11.4V at the pack level. Some Bodine charge controllers run a voltage-window check before switching to the green float state, and a pack outside that window stays flagged. Allow the fitting to charge uninterrupted for at least 24 hours. If the indicator does not shift to green after that period, measure the pack voltage directly — it should read 12.4V to 12.6V at full charge. A reading below 11V after 24 hours on charge points to a wiring fault at the connector, not a failed cell.
Emergency light dims partway through a duration test
Dimming during a test is not the same as failing to activate — it means the cell delivered initial current but voltage sagged under sustained load. On a new replacement pack, this almost always means the cell was not fully conditioned before the test ran. The charge controller needs one complete charge cycle after installation to calibrate the float voltage against actual cell capacity. Fit the battery, leave the unit on mains for a full 24-hour charge, then run the manual test. If dimming persists after a confirmed full charge, check the pack voltage under load — a reading that drops below 9V quickly indicates a weak cell in the 3S string.