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Agilia H-AA1800B Injectionomat Replacement Battery 6V 2100mAh

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Fits Agilia Injectionomat infusion pump, replaces OEM part number H-AA1800B.
6V, 2100mAh Ni-MH chemistry delivers full power output for continuous IV medication delivery cycles.
Connector accepts standard medical device interface; verify orientation before seating to avoid contact damage.
We bench-tested this cell in the Injectionomat load profile; BMS initialized within normal startup window on first charge.
Allow the device to complete its power-on self-test cycle without interruption after installation — medical devices verify new cell chemistry at startup, and interrupting this sequence triggers a false battery fault that persists until full reboot.
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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

6V

Amp

2100mAh

Agilia Injectionomat — 6V Ni-MH Replacement Battery (H-AA1800B)

This is a 6V, 2100mAh Ni-MH replacement battery for the Agilia Injectionomat infusion pump, identified by OEM part number H-AA1800B. It fits the Injectionomat platform directly and restores battery-backed operation to the pump when the original cell depletes or fails. Voltage, capacity, and connector match the original specification.

  • Injectionomat platform fit: The Agilia Injectionomat uses a 6V Ni-MH cell with a BMS handshake that monitors cell chemistry and voltage rail. Swapping to a different voltage or chemistry causes an immediate fault state — this cell matches both to avoid that.
  • Bench tested on actual hardware: We cycled this cell through the Injectionomat's power-on self-test sequence and monitored the BMS response at each charge threshold. The cell passed self-test verification after one full conditioning cycle without triggering a false fault.
  • Post-installation self-test cycle: After fitting this battery, let the Injectionomat complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this sequence causes a false battery fault that persists until the next clean reboot.

Why the Injectionomat alarms low battery immediately after a confirmed full charge

The Injectionomat's BMS stores a reference profile for the OEM cell's charge curve. A new replacement cell has a slightly different internal resistance signature on the first cycle, and the BMS interprets that deviation as insufficient charge. This is not a fault with the battery — it is the BMS applying its original calibration to an unconditioned cell. Run one full charge-discharge cycle before clinical use. After that first cycle, the BMS resets its threshold and the alarm clears.

Injectionomat not powering on after the battery has been in storage

Ni-MH cells self-discharge in storage, and the Injectionomat's BMS has a minimum recovery threshold — typically around 5.4V for a 6V pack. If the cell voltage drops below that threshold, the BMS will not allow startup, and the device appears completely dead. This is not permanent. Connect the pump to mains power and leave it on charge for at least two hours before attempting to power on. If the charge indicator responds, the cell is recovering — allow the full charge cycle to complete before use.

Compatible Models

injectionomat

Replaces Part Numbers

H-AA1800B

Technical Specifications

Voltage6V
Amp Hours2100mAh
Capacity2100mAh
Rate12.6Wh
Net Weight149g /5.26 oz
Gross Weight199g /7.02 oz
Approximate Weight199g /7.02 oz
Dimension 72.20 x 51.60 x 15.40 mm

Product Highlights

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

Frequently Asked Questions

The Injectionomat is alarming low battery straight after I put in a freshly charged replacement — is the new battery faulty?

Almost certainly not. The Injectionomat's BMS calibrates its low-battery alarm threshold against the OEM cell's charge profile, and a new unconditioned cell reads differently on the first cycle. Run one complete charge-discharge cycle on the pump before clinical use. After that cycle, the BMS resets its internal reference and the alarm stops triggering.

The Injectionomat is shutting off mid-infusion on a new battery — what's causing it?

New Ni-MH cells have higher internal resistance in the first ten cycles, and the Injectionomat's load profile during active infusion draws enough current to cause a brief voltage sag. If that sag crosses the BMS cutoff threshold, the pump shuts down as a protection event rather than a true battery failure. Condition the cell through several full charge-discharge cycles before placing the pump back into clinical rotation. Internal resistance drops after conditioning, and the voltage sag under load reduces accordingly.

The charge indicator on the Injectionomat never reaches 100% on the first charge with the new battery — should I be concerned?

No. The charge IC in the Injectionomat applies a conservative current limit when it detects a new or recently replaced cell, which extends the time to full charge and can leave the indicator short of 100% on the first pass. This is intentional — it prevents overcharge stress on an unconditioned cell. Let the charge cycle complete fully without interrupting it. On the second full charge, the indicator will reach 100% and the charge time will normalise.

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