About this replacement
TRIDONIC 28002317 — 3.2V LiFePO4 Replacement Battery
This is a 3.2V LiFePO4 cell rated at 7200mAh (23.04Wh), built as a direct replacement for the TRIDONIC 28002317 emergency lighting unit. It restores the backup power capacity that allows the fitting to illuminate during a mains failure event. Dimensions are 74.00 × 69.00 × 19.30mm — confirm these against the original cell before ordering.
- 28002317 fitting compatibility: The 28002317 charge controller is calibrated to a 3.2V LiFePO4 float voltage. Substituting a different chemistry or nominal voltage causes the controller to misread state of charge, triggering a false fault condition or chronically undercharging the cell.
- Bench tested on actual hardware: We ran the cell through a full charge cycle and simulated mains-fail load draw. The BMS held within the expected voltage window throughout and no premature cutoff was recorded at the 28002317's rated test duration.
- First-install test cycle: Within 24 hours of fitting, hold the test button for the full rated duration. This allows the charge controller to register the new cell capacity and ensures the fitting logs a passing result before the next scheduled compliance inspection.
Charge indicator staying red after new battery installation in the 28002317
A replacement LiFePO4 cell stored for several months can sit below the float acceptance window the 28002317 controller expects — typically under 3.0V per cell. When the controller sees that low resting voltage, it flags a fault rather than entering normal charge mode. Leave the fitting on mains power undisturbed for 12–24 hours; the controller will trickle-charge the cell back up through the acceptance threshold. Once the cell reaches approximately 3.2V resting, the charge indicator should transition to green.
Emergency light dims partway through a duration test after battery replacement
This is a first-activation issue, not a cell defect. A freshly installed cell has not yet completed a full conditioning charge, so available capacity during the first test draw is lower than rated. The fitting dims or drops out early because usable energy runs short before the test period ends. Recharge fully on mains for at least 24 hours, then repeat the duration test. A cell that still dims after a second full charge cycle should be checked for a wiring connection fault at the battery terminals before concluding the cell is faulty.