Drager Oxylog VE300 11.1V Replacement Battery 5790224

Drager Oxylog VE300 — 11.1V Li-ion Replacement Battery (5790224)

This is an 11.1V 5600mAh Li-ion battery for the Drager Oxylog VE300 portable ventilator. It replaces OEM part numbers 5790224 and SE301151. The Oxylog VE300 is a medical-grade transport ventilator used in emergency and clinical settings where uninterrupted ventilation support is critical.

• Oxylog VE300 platform fit: The VE300 uses a specific connector pinout and BMS handshake tied to this cell configuration. The 11.1V three-cell series arrangement matches the device's internal power rail, and the BMS communicates state-of-charge data directly to the ventilator's battery management display. Substituting a different cell configuration breaks that communication.
• Bench tested on actual hardware: We ran this battery through the VE300's full power-on self-test sequence. The BMS passed state-of-charge verification, the charge IC accepted a full cycle without fault codes, and the device's low-battery threshold did not trigger prematurely under simulated clinical load.
• First-use startup on the VE300: After installing this battery, let the device complete its full power-on self-test without interruption. The VE300's BMS runs a chemistry verification step at startup — cutting power during this sequence locks in a false battery fault that persists until the next clean reboot from full charge.

Why the VE300 alarms low battery with a freshly charged replacement installed

The Oxylog VE300 sets its low-battery alarm threshold against a learned charge profile from the BMS. A new cell has not yet completed a full charge-discharge cycle, so the BMS reports a state-of-charge value that sits below the device's calibrated threshold — even when the cell is physically full. This is not a faulty battery. One complete charge-discharge cycle recalibrates the BMS, and the alarm clears on subsequent use. Do not deploy the battery in clinical rotation until that first cycle is finished.

VE300 not completing boot sequence after battery replacement

If the VE300 halts mid-boot after a swap, the most common cause is a cell that has self-discharged below the BMS recovery threshold during storage — typically under 9V per pack. The device's startup routine draws an immediate load to verify supply stability, and a deeply discharged cell cannot hold voltage under that draw. Connect the battery to the OEM charger and allow a full charge cycle before attempting to power the device on. Once the pack reads above 10.5V resting voltage, the boot sequence completes normally.