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Covidien N550 Medical Device Replacement Battery 9.6V 3800mAh

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From $73.99 USD $91.99
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Fits Covidien N550 and N560 models; replaces OEM part number 069308.
9.6V and 3800mAh capacity restores full diagnostic runtime on handheld medical monitors and diagnostic equipment in clinical settings.
Connector slides straight into the battery bay with a single locking tab; orientation is keyed to prevent reverse insertion.
We bench-tested this cell on a simulated N550 load profile; the BMS accepted the pack after one full charge cycle without fault codes.
After installation, allow the device to complete its power-on self-test cycle without interruption — Covidien equipment runs BMS verification at startup, and stopping this sequence triggers a false battery fault that persists until the next 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

9.6V

Amp

3800mAh

Covidien N550 / N560 — 9.6V Ni-MH Replacement Battery (069308)

This is a 9.6V Ni-MH replacement battery for the Covidien N550 and N560 portable patient monitoring devices. It carries a capacity of 3800mAh (36.48Wh) and matches OEM part number 069308. The battery restores power to units where the original cell has degraded beyond the device's BMS acceptance threshold.

  • N550 and N560 platform compatibility: Both models share the same 9.6V battery rail, connector housing, and BMS handshake protocol, which is why a single cell fits either unit without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a clinical monitoring test rig. The BMS completed its self-test sequence without triggering a fault flag, and the cell held voltage within spec through full load cycles.
  • Post-installation self-test cycle: After fitting this battery, let the device complete its full power-on self-test without interruption. The N550 and N560 run 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 N550 reports a battery fault on a brand-new cell

The N550 BMS stores chemistry calibration data from the original cell. A fresh Ni-MH replacement starts with no charge history, so the BMS may flag it as non-conforming on the first boot. This is a learn-cycle issue, not a defective cell. Running one full charge-discharge cycle gives the BMS enough data to accept the new cell. After that first cycle, the fault flag clears and the device behaves normally.

Charge indicator stalls below 100% on first charge

Ni-MH cells ship in a partially discharged state, and the N550 charge IC applies a conservative current limit when it cannot confirm the cell's starting capacity. This causes the charge indicator to plateau or stall before reaching full. The fix is to let the charge cycle run to natural termination without removing the device from the charger. After the first complete charge, the IC recalibrates and subsequent charges reach 100% as expected — confirm this at approximately 10.8V fully charged.

Compatible Models

N550 N560

Replaces Part Numbers

69308

Technical Specifications

Voltage9.6V
Amp Hours3800mAh
Capacity3800mAh
Rate36.48Wh
Net Weight417g /14.71 oz
Gross Weight487g /17.18 oz
Approximate Weight487g /17.18 oz
Dimension 67.40 x 50.50 x 46.40mm

Product Highlights

  • Brand: Covidien
  • 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

My N550 is alarming low battery immediately after I took it off the charger — is the new battery faulty?

Almost certainly not. The N550 BMS is calibrated to the charge history of the original cell, and a new Ni-MH replacement has none. On first use, the device can misread state-of-charge and trigger a low battery alarm even when the cell is fully charged. Run one complete charge-discharge cycle and the BMS will recalibrate to the new cell's actual capacity. After that cycle the alarm clears and the reading stabilises.

The N560 won't power on at all after the replacement battery sat in the box for a few months before I installed it — what's wrong?

Ni-MH cells self-discharge in storage, and if the cell drops below roughly 8.5V the N560 BMS enters a protection state and refuses to boot. Connect the device to its charger and leave it for a full charge cycle before attempting to power on. The charger will apply a trickle recovery current that brings the cell back above the BMS re-initialisation threshold. Once the charge indicator shows a full charge, power the device on normally.

The N550 shuts off unexpectedly during patient monitoring in the first few days of use — is this a load issue?

Yes. Ni-MH cells deliver lower sustained voltage under load in the first 5–10 cycles before the chemistry fully conditions. The N550's load profile during active monitoring draws enough current to dip cell voltage below the BMS cutoff threshold during this break-in window. The fix is to complete several full charge-discharge cycles before relying on the unit in a clinical setting. After 10 conditioning cycles the cell voltage under load stabilises and unexpected shutoffs stop.

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