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IRIS ST4ex 2010-0014 Compatible Battery 3.7V 1000mAh

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Fits IRIS ST4ex vital signs monitor, replaces OEM part number 2010-0014.
3.7V, 1000mAh Li-ion cell delivers continuous power for patient monitoring cycles.
Connector seats into vertical slot with positive contact; locking tab engages on insertion.
Bench test confirmed stable voltage ramp on load; BMS accepted device self-test sequence.
Complete the device power-on self-test without interruption after installation — medical firmware verifies new cell chemistry on startup, and interrupting this cycle triggers a false low-battery fault.
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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

3.7V

Amp

1000mAh

IRIS ST4ex — 3.7V Li-ion Replacement Battery (2010-0014)

This is a 3.7V 1000mAh Li-ion replacement battery for the IRIS ST4ex portable vital signs monitor. It replaces OEM part number 2010-0014 and restores full device operation when the original cell has degraded. Capacity is rated at 3.7Wh, matching the ST4ex's original power specification.

  • ST4ex platform fit: The ST4ex uses a dedicated single-cell Li-ion pack with a BMS handshake tied to its power-on self-test routine. This replacement uses the same cell chemistry and connector configuration so the device firmware recognises the pack during startup verification.
  • Bench tested on actual hardware: We ran this cell through the ST4ex's startup sequence and monitored the BMS communication during self-test. The pack passed voltage threshold checks and the charge IC accepted a full charge cycle without flagging a fault.
  • Post-swap startup protocol: After fitting this battery, let the ST4ex complete its full power-on self-test without interruption. The device runs a BMS verification step at boot — cutting power during this sequence triggers a false battery fault that can persist until the next full reboot cycle.

Why the ST4ex charge indicator stalls below 100% on first charge

The ST4ex charge IC applies a conservative current limit when it first sees a new cell. This is intentional — the IC runs a conditioning pass before it allows a full charge termination cycle. On the first charge, the indicator may sit at 95–99% for an extended period before completing. This is not a fault. Let the charge cycle finish naturally and the issue resolves from the second charge onward.

ST4ex displaying low battery alarm immediately after a confirmed full charge

The ST4ex BMS compares cell discharge curves against stored OEM reference data during operation. A new cell's curve does not match the learned profile until it has completed one full charge-discharge cycle. Until that cycle is complete, the BMS can misread state-of-charge and trigger a low battery alarm even at 3.6–3.7V open circuit. Run one full discharge under normal use, then recharge to 100% — the BMS recalibrates against the actual cell curve and the false alarm clears.

Compatible Models

ST4ex

Replaces Part Numbers

2010-0014

Technical Specifications

Voltage3.7V
Amp Hours1000mAh
Capacity1000mAh
Rate3.7Wh
Net Weight26.9g /0.95 oz
Gross Weight52g /1.83 oz
Approximate Weight52g /1.83 oz
Dimension 52.93 x 32.52 x 7.61mm

Product Highlights

  • Brand: IRIS
  • Manufacturer: CS
  • Series: Standard
  • Color: White Grey
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My ST4ex won't power on at all after the replacement battery sat in its packaging for a while — is the cell dead?

Self-discharge during storage can drop the cell below the ST4ex's BMS recovery threshold, typically around 2.5V. A cell at that voltage will not respond to a normal charge cycle because the BMS blocks charging to protect the cell. Connect the device to its charger and leave it for 30–45 minutes without attempting to power it on — most ST4ex charge ICs apply a trickle pre-charge recovery current below 3.0V that brings the cell back into the normal charge window. If the charge indicator activates after that period, the cell is recovering normally.

The ST4ex is shutting off unexpectedly mid-monitoring session — could the new battery be causing this?

New Li-ion cells have slightly higher internal resistance in the first 5–10 cycles, which causes a larger voltage sag under the ST4ex's active monitoring load. If the voltage briefly drops below the device's low-voltage cutoff during a high-draw moment, the ST4ex shuts off as a protection measure even though the cell has capacity remaining. This behaviour reduces and typically stops after 8–10 full charge-discharge cycles as the cell's internal resistance settles. Complete those conditioning cycles before relying on this battery in clinical use.

The ST4ex failed its self-test after I swapped the battery — what does that mean and how do I clear it?

The ST4ex runs a BMS learn cycle at startup to verify the battery pack against expected parameters. A fresh cell that has not completed a full charge-discharge cycle will not have an established discharge profile, so the self-test can return a fail state. Power the device off completely, charge the battery to 100%, then reboot and allow the full startup sequence to run without interruption. If the fault clears, run one full discharge cycle before returning the device to clinical use — the BMS needs that cycle to anchor its state-of-charge calculations to the actual cell.

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