BREAS HD60-7050 Portable Oxygen Concentrator Compatible Battery 14.4V

BREAS HD60-7050 — 14.4V Li-ion Replacement Battery

This 14.4V 3400mAh (48.96Wh) Li-ion battery replaces the original cell in the BREAS HD60-7050 portable oxygen concentrator. It fits the HD60-7050 directly and matches the voltage and capacity spec the device BMS expects. Use it when the original battery no longer holds a full charge or fails the device self-test.

• HD60-7050 fit: The HD60-7050 runs a 14.4V nominal rail with a BMS handshake at startup. This cell matches that voltage profile and the physical connector configuration, so the concentrator completes its power-on sequence without throwing a battery fault.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a 14.4V Li-ion test rig, monitoring BMS communication at each stage. The protection circuit responded correctly to charge cutoff and load cutoff thresholds throughout.
• First-use self-test protocol: After installing this battery, let the HD60-7050 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-sequence triggers a false battery fault that sticks until the next clean reboot.

Why the HD60-7050 alarms low battery immediately after a confirmed full charge

The HD60-7050 BMS is calibrated to the charge profile of the original OEM cell chemistry. A new replacement cell has not yet completed a full charge-discharge learn cycle, so the BMS reads the state-of-charge estimate as unreliable and trips the low battery alarm as a precaution. This is not a fault with the replacement cell — it is the BMS applying a conservative threshold until it has cycle data to work from. Run one complete charge from flat to full and the alarm clears on the next startup. Do not use the device clinically until that first full cycle is complete.

Charge indicator not reaching 100% on first charge

On the first charge, the HD60-7050 charge IC applies a reduced current limit to a cell it has not previously profiled, which means the indicator may stop at 95–98% and the device reports the battery as not fully charged. This is the charge controller being conservative, not a capacity defect. Let the charger run without interrupting it — the IC will top-balance the cell and the indicator will reach 100% before or during the second charge cycle. After that first full cycle, charging behaviour normalises to the standard cutoff voltage of 16.8V.