About this replacement
Fahl Tracheoport 63500 Suction Unit — 12V Ni-MH Replacement Battery (110508)
This is a 12V 2000mAh Ni-MH replacement battery for the Fahl 63500 Tracheoport suction unit. It replaces OEM part numbers 110508 and 312.0620.0. Dimensions are 72.50 × 52.00 × 29.20mm — confirm these match your existing cell before installing.
- Fahl 63500 and Tracheoport compatibility: Both the 63500 and the Tracheoport suction unit draw from the same 12V power rail and use the same connector and BMS handshake protocol — one cell fits both platforms without modification.
- Bench tested on actual hardware: We cycled this battery through charge and discharge on the 63500 platform. The BMS accepted the cell on the first cycle and showed no impedance rejection flags. Charge termination triggered cleanly at full capacity.
- Post-installation self-test cycle: After fitting this battery, allow the Tracheoport to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-sequence logs a false battery fault that persists until the next full reboot.
Device not completing boot sequence after battery swap
The Fahl 63500 runs a BMS learn cycle on first use with a new cell. If the device stalls or restarts during boot, the battery's state-of-charge profile hasn't been accepted by the charge IC yet. This is not a faulty cell — it's the device calibrating against a new chemistry baseline. Run one complete charge-discharge cycle before drawing any clinical conclusion about the replacement battery.
Low battery alarm triggers immediately after a confirmed full charge
The 63500's BMS compares internal resistance against a stored OEM threshold. A new Ni-MH cell starts with slightly elevated internal resistance before its chemistry stabilises — this trips the low-battery alarm even when the cell is fully charged. The alarm clears after one complete charge-discharge cycle normalises the cell's impedance signature. Charge the battery to full, run the device through a full discharge, then recharge before clinical use.