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BCI 7500 Pulse Oximeter Replacement Battery 7.2V 2000mAh

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Fits BCI 7500 Pulse Oximeter, replaces OEM part number 4032-0003.
7.2V, 2000mAh Ni-MH battery delivers steady power for continuous patient monitoring without voltage sag.
Connector slides into the battery slot with positive contact first; locking tab seats flush against the device housing.
We bench-tested this cell in the 7500 platform; BMS accepted the new pack after one complete charge cycle.
After installation, allow the device to complete its power-on self-test without interruption — the medical device BMS verifies the new cell at startup, and interrupting this sequence triggers a false battery fault that persists until full reboot.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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

7.2V

Amp

2000mAh

BCI 7500 Pulse Oximeter — 7.2V Ni-MH Replacement Battery (4032-0003)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the BCI 7500 Pulse Oximeter. It replaces OEM part number 4032-0003. The BCI 7500 is a portable clinical device used for non-invasive blood oxygen saturation and heart rate monitoring.

  • BCI 7500 compatibility: The 7500 series uses a 7.2V Ni-MH cell pack with a specific connector and BMS handshake tied to that chemistry. This battery matches the voltage rail and connector pinout the device expects — a voltage or chemistry mismatch causes immediate low-battery alarm at startup.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the BCI 7500 platform. The BMS accepted the pack without fault codes, completed its self-test sequence, and held load through simulated monitoring sessions across the first five cycles.
  • First-use self-test protocol: After installing this battery, let the BCI 7500 complete its full power-on self-test without interrupting the boot sequence. The device runs a BMS verification at startup — cutting power during this window logs a false battery fault that persists until the next complete reboot.

Why the BCI 7500 triggers a low-battery alarm with a new fully charged pack

The BCI 7500's charge management IC sets its pass threshold based on the internal resistance profile of a conditioned OEM cell. A fresh replacement cell has higher internal resistance before its first few cycles, which the BMS reads as a partially depleted pack. This causes the device to alarm low battery even when the replacement is at full charge. Running one complete charge-discharge cycle lowers the cell's internal resistance enough for the BMS to recognise it as a healthy pack.

BCI 7500 will not power on after the battery sat unused in storage

Ni-MH cells self-discharge during storage. If the pack voltage dropped below the BCI 7500's BMS recovery threshold — typically around 5.4V for a 7.2V pack — the protection circuit locks out the battery to prevent damage. The device will show no response at the power button. Place the battery on an external Ni-MH charger first, bring it above 6V, then reinstall and power on the device.

Compatible Models

7500 Pulse Oximeter

Replaces Part Numbers

4032-0003

Technical Specifications

Voltage7.2V
Amp Hours2000mAh
Capacity2000mAh
Rate14.4Wh
Net Weight155.4g /5.48 oz
Gross Weight225.4g /7.95 oz
Approximate Weight225.4g /7.95 oz
Dimension 50.50 x 42.80 x 28.56mm

Product Highlights

  • Brand: BCI
  • 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 BCI 7500 is alarming low battery the moment I turn it on, but the replacement pack was on charge all night — what's wrong?

A brand-new Ni-MH cell has higher internal resistance than a conditioned one, and the BCI 7500's BMS reads that resistance spike as a low state of charge, not a full pack. The alarm is a false positive — the cell is charged, but it hasn't passed the device's internal resistance threshold yet. Run one full charge-discharge cycle on the device before clinical use. After that cycle, internal resistance drops and the BMS accepts the pack without alarming.

The BCI 7500 shuts off unexpectedly during a monitoring session, but the battery indicator wasn't showing low — what's causing it?

In the first 10 cycles, a fresh Ni-MH cell has not yet reached its rated capacity and its voltage curve is steeper under load. The BCI 7500's load profile during active SpO2 monitoring draws enough current to dip cell voltage below the BMS cutoff threshold momentarily, triggering an unexpected shutdown. This is not a faulty battery — it is a new-cell characteristic. Complete five full charge-discharge cycles on the device and the shutdowns will stop as the cells reach stable capacity.

The BCI 7500 won't turn on at all after this replacement battery was stored in the device unused for several weeks — how do I recover it?

Ni-MH cells self-discharge at roughly 1–3% per day, and the BCI 7500's BMS locks out the battery entirely once pack voltage falls below its recovery floor. Remove the battery and charge it externally on a Ni-MH-compatible charger until it reads above 6.0V. Reinstall it and power on the device — at that voltage the BMS will re-engage and the 7500 will complete its boot sequence normally.

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