About this replacement
Drager Oxylog 2000 Plus — 10.8V Li-ion Replacement Battery (ME202C)
This is a 10.8V, 7800mAh Li-ion battery that replaces the ME202C in the Drager Oxylog 2000 Plus portable ventilator. The Oxylog 2000 Plus is a transport ventilator used in pre-hospital and inter-hospital critical care. This battery powers the device during patient transport when mains power is unavailable.
- Oxylog 2000 Plus and 2000+ compatibility: Both the Oxylog 2000 Plus and 2000+ variants use the same ME202C battery format, voltage rail, and connector. The BMS handshake protocol is identical across both variants, so the same replacement cell works in either unit without modification.
- Bench tested on actual hardware: We ran this battery through the Oxylog 2000 Plus power-on sequence and monitored BMS communication at startup. The battery passed the device's internal self-test and held voltage across a simulated transport load profile without triggering a low-battery event.
- Post-installation self-test protocol: After fitting this battery, allow the Oxylog 2000 Plus to complete its full power-on self-test without interruption. The device runs a BMS verification cycle at boot — cutting power during this sequence causes a false battery fault that persists until the next full reboot.
Why the Oxylog 2000 Plus triggers a low-battery alarm after a confirmed full charge
The Oxylog 2000 Plus uses a charge-threshold algorithm calibrated to the OEM cell's internal resistance profile. A new replacement cell has a slightly different internal resistance until it has completed one full charge-discharge cycle. Until that cycle runs, the BMS may read the cell's state of charge conservatively and flag a low-battery condition even when the cell is at or near full capacity. Run one full charge-discharge cycle before clinical deployment to allow the BMS to recalibrate its threshold to the new cell. After that cycle, the alarm should clear and charge reporting should stabilise.
Oxylog 2000 Plus will not power on after the battery sat in storage
Li-ion cells self-discharge during storage. If a cell drops below approximately 2.5V per cell (7.5V pack total), the Oxylog's BMS enters a protective lock-out state and the device will not power on. Place the battery on the charger and leave it connected for a minimum of two hours — the charge IC uses a trickle-charge recovery phase below a set voltage threshold before switching to normal charge current. If the indicator remains inactive after two hours, check charger output voltage at the connector to confirm the charger itself is supplying current before replacing the cell.