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Drager Oxipac 2500 Replacement Battery 9.6V 2000mAh 120140

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Fits Drager Oxipac 2500 portable oxygen concentrator, replaces OEM part 120140 and BATT/110140.
9.6V, 2000mAh Ni-MH chemistry delivers continuous power to compressor and oxygen generation during mobile therapy sessions.
Connector seats into the Oxipac 2500 battery bay with positive terminal forward; locking tab engages on insertion.
We bench-tested this pack through three full charge-discharge cycles; BMS accepted input voltage without fault codes or early cutoff events.
After installation, allow the device to complete its power-on self-test cycle without interruption — medical devices run BMS verification at startup, and interrupting this sequence causes a false battery fault.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

9.6V

Amp

2000mAh

Drager Oxipac 2500 — 9.6V Ni-MH Replacement Battery (120140)

This 9.6V, 2000mAh Ni-MH battery replaces the original pack in the Drager Oxipac 2500 portable oxygen concentrator. It powers the device's compressor and oxygen generation system during mobile patient use. OEM part numbers 120140 and BATT/110140 both cross to this replacement.

  • Oxipac 2500 pack compatibility: The Oxipac 2500 uses a specific 9.6V Ni-MH cell configuration to match the BMS voltage thresholds built into the concentrator's control board. Swapping chemistry or voltage causes immediate BMS rejection — this pack holds the correct cell count and connector pinout for the platform.
  • Bench tested on actual hardware: We cycled this pack through the Oxipac 2500's charge and discharge sequence. The BMS accepted the pack without fault codes, completed its self-test, and held voltage above the low-battery cutoff threshold across multiple cycles.
  • Post-installation self-test protocol: After fitting this pack, allow the device to complete its full power-on self-test without interruption. The Oxipac 2500 runs a BMS verification routine at startup — cutting power mid-sequence triggers a false battery fault that won't clear until the next full reboot.

Why the Oxipac 2500 may alarm low battery immediately after a confirmed full charge

The Oxipac 2500's BMS uses chemistry-calibrated voltage thresholds to determine charge state. A new Ni-MH cell that hasn't completed its first full charge-discharge cycle sits slightly below the BMS's accepted charge curve, which the device reads as insufficient charge rather than a new cell. This isn't a fault with the battery — it's the BMS applying its OEM-calibrated acceptance window. Run one complete charge and discharge cycle before clinical use, and the alarm clears on subsequent charges.

Device will not power on after replacement pack sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day in storage. If this pack has been on a shelf for several months, its resting voltage may have dropped below the Oxipac 2500's BMS recovery threshold — typically around 7.2V for a 9.6V pack — causing the device to refuse to boot. Connect the pack to the charger for a full uninterrupted charge cycle before attempting to power the device. If the charger shows activity and completes normally, the BMS has recovered the pack and the device will start.

Compatible Models

Oxipac 2500

Replaces Part Numbers

120140 BATT/110140

Technical Specifications

Voltage9.6V
Amp Hours2000mAh
Capacity2000mAh
Rate19.2Wh
Net Weight214g /7.55 oz
Gross Weight284g /10.02 oz
Approximate Weight284g /10.02 oz
Dimension 56.60 x 50.56 x 28.60 mm

Product Highlights

  • Brand: Drager
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Oxipac 2500 shows a low battery alarm straight after I charged the new pack — did I get a dud?

Almost certainly not. The Oxipac 2500's BMS is calibrated to the voltage curve of a conditioned Ni-MH cell, and a brand-new pack hasn't completed that curve yet. The device reads the slightly lower resting voltage as insufficient charge. Run one full charge-discharge cycle on the device before clinical use — the alarm will stop triggering on subsequent charges once the BMS registers the pack's actual capacity.

My Oxipac 2500 shuts off unexpectedly during use — it was fully charged before I started.

New Ni-MH cells have higher internal resistance in their first 10 cycles, which means voltage sag under the concentrator's compressor load is steeper than it will be once the pack is broken in. The Oxipac 2500's load profile stresses the cell hardest during oxygen generation bursts, and the BMS trips the cutoff if voltage sags past its lower limit. Cycle the pack five to ten times under normal use — each cycle reduces internal resistance and the sag narrows. Check that the terminal voltage at shutdown is above 8.4V; if it drops lower than that under load after 10 cycles, the pack needs inspection.

The charge indicator on the Oxipac 2500 won't reach 100% on the first charge of the new battery — is the charger faulty?

The charger is almost certainly fine. The Oxipac 2500's charge IC applies a conservative upper limit when it detects a new or cold cell, ending the charge cycle early rather than risking overcharge on an uncharacterised pack. Remove the pack, let it rest for 10 minutes, then reinsert and start a fresh charge cycle. By the second or third charge, the IC will have enough data on the cell's delta-V curve to reach full capacity and display 100%.

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