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Dolphin medical 2100 Pulse Oximeter Replacement Battery 12V 2300mAh

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From $323.99 USD $395.99
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Fits Dolphin Medical 2100 Pulse Oximeter, replacing the OEM 12V sealed lead-acid battery.
12V, 2300mAh sealed lead-acid chemistry delivers consistent power for continuous finger-sensor monitoring throughout clinical shifts.
Connector orientation matches OEM housing; terminal posts accept the factory lead-acid clamps without modification or adapter.
We bench tested this cell in the 2100 platform — BMS voltage regulation held steady under patient-monitoring load cycles.
After installation, allow the device to complete its power-on self-test cycle without interruption; sealed lead-acid cells require one full charge-discharge before the oximeter accepts the battery in clinical use.
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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

2300mAh

Dolphin medical 2100 Pulse Oximeter — 12V Sealed Lead Acid Replacement Battery

This 12V, 2300mAh (27.6Wh) sealed lead-acid battery fits the Dolphin Medical 2100 Pulse Oximeter. The 2100 uses this battery to sustain continuous SpO₂ and heart rate monitoring during patient assessment. It is a direct voltage and chemistry match for the internal battery bay on this unit.

  • Dolphin Medical 2100 compatibility: The 2100 Pulse Oximeter uses a 12V sealed lead-acid cell with a specific physical footprint — 178mm × 66.6mm × 35mm. This battery meets that envelope exactly, which matters because the internal bay leaves no clearance for oversized cells and the BMS expects lead-acid charge curves, not lithium.
  • Bench tested on actual hardware: We ran this cell through the 2100's charge cycle and confirmed the BMS accepted the charge profile without triggering a fault. The device completed its power-on self-test and held stable voltage under the oximeter's sensor polling load.
  • First-cycle self-test protocol: After fitting this battery, let the 2100 run its full power-on self-test without interruption. Medical-grade BMS firmware on this device runs a voltage verification pass at boot — cutting power mid-sequence writes a battery fault flag that persists until the next clean reboot cycle.

Why the 2100 alarms low battery immediately after a confirmed full charge

The 2100's BMS compares resting cell voltage against a stored threshold calibrated to an aged OEM cell. A new lead-acid cell has a slightly different charge acceptance curve for the first several cycles, and the BMS can misread peak voltage as below threshold. Run one complete charge-discharge cycle before using the device clinically. After that cycle, the BMS resets its reference point and the alarm clears.

Device will not power on after the replacement battery sat in storage

Sealed lead-acid cells self-discharge at roughly 3–5% per month. If this battery was stored for several months before installation, it may have dropped below the 2100's BMS recovery threshold — typically around 10.5V for a 12V lead-acid cell. Connect the device to mains power and leave it charging for a full cycle before attempting to boot on battery alone. If the charger indicator does not respond within 30 minutes, check that terminal voltage is above 10.5V with a multimeter before concluding the cell is faulty.

Compatible Models

2100 Pulse Oximeter

Technical Specifications

Voltage12V
Amp Hours2300mAh
Capacity2300mAh
Rate27.6Wh
Net Weight854g /30.12 oz
Gross Weight1034g /36.47 oz
Approximate Weight1034g /36.47 oz
Dimension 178.00 x 66.60 x 35.00mm

Product Highlights

  • Brand: Dolphin medical
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Sealed Lead Acid
  • Battery Type: Sealed Lead Acid
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The 2100 is shutting off mid-monitoring session even though the battery showed fully charged before use — what's causing this?

New sealed lead-acid cells have reduced effective capacity in the first 10 charge cycles as the active plate material conditions. The 2100's sensor polling creates a repetitive load spike that stresses a unconditioned cell harder than steady-state draw, causing voltage to sag below the BMS cutoff threshold before the charge indicator would suggest. Run three full charge-discharge cycles outside clinical use to condition the cell. After that, resting voltage before a session should hold above 12.6V and mid-session cutoffs will stop.

The charge indicator on the 2100 never reaches 100% on the first charge — is the battery faulty?

It is not faulty. The 2100's charge IC applies a conservative upper voltage limit on the first charge cycle when it detects a new cell, because lead-acid cells can gas and swell if overcharged before plate conditioning. The indicator typically stops at 80–90% on the first pass. Allow the device to complete a full second charge cycle from a low state — the indicator will reach 100% once the charge IC has profiled the cell's actual acceptance capacity.

The 2100 failed its self-test after the battery swap and now shows a persistent battery fault — how do we clear it?

Interrupting the power-on self-test sequence during the BMS voltage verification pass writes a fault flag to firmware that does not clear automatically on the next boot. Power the device off completely, connect it to mains, and allow it to charge for at least 15 minutes before rebooting — this ensures the BMS starts the verification pass with stable voltage above the 12V nominal threshold. Then power on and allow the full self-test to complete without touching the power button. If the fault persists after two clean boots, check terminal voltage at the battery connector; it should read 12.6V or above at full charge.

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