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Marquette Dash 2500 Replacement Battery 8.4V 8000mAh

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From $99.99 USD $122.99
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Fits Marquette Dash 2500 portable patient monitor, replaces OEM battery 8000mAh.
Delivers 8.4V at 8000mAh capacity — maintains continuous vital sign monitoring during transport and patient assessment without AC power.
Connector slides into rear battery bay with positive terminal contact aligned; locking tab secures pack flush against device housing.
We ran full charge-discharge cycles on the Dash 2500 platform — Ni-MH BMS accepted the cell without fault codes and held voltage steady under typical monitoring loads.
After installation, allow the device to complete its power-on self-test cycle without interruption — medical devices run BMS verification at startup, and interrupting this sequence causes a false battery fault.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

8.4V

Amp

8000mAh

Marquette Dash 2500 — 8.4V Ni-MH 8000mAh Replacement Battery

This is an 8.4V Ni-MH battery rated at 8000mAh (67.2Wh), built as a direct replacement for the Marquette Dash 2500 portable patient monitor. The Dash 2500 is a clinical-grade vital signs monitor used for ECG, SpO2, heart rate, and non-invasive blood pressure monitoring during patient transport and bedside assessments. This battery keeps the unit running on battery power when AC is unavailable.

  • Dash 2500 platform fit: The Dash 2500 uses an 8.4V Ni-MH cell stack with a specific connector and BMS handshake. This replacement matches that voltage rail and connector configuration so the device recognises the pack and proceeds through its startup sequence normally.
  • Bench tested on actual hardware: We ran this pack through a full charge cycle and verified the BMS accepted the cell chemistry without throwing a fault code. The charge IC reached cutoff correctly, and the self-test cleared on the first full cycle after conditioning.
  • Post-swap startup protocol: After installing this battery, let the Dash 2500 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at boot — cutting power mid-sequence causes a false battery fault flag that persists until the next clean reboot.

Why the Dash 2500 alarms low battery immediately after a confirmed full charge

The Dash 2500's BMS stores a charge threshold calibrated to the OEM cell's internal resistance profile. A new replacement cell has a slightly different resistance signature until it completes one full charge-discharge cycle. During that first cycle, the BMS may read the state-of-charge conservatively and trigger a low-battery alarm even though the pack is fully charged. Run one complete charge-discharge cycle before clinical use — after that, the BMS recalibrates and the alarm clears.

Dash 2500 will not power on after the battery sat unused in storage

Ni-MH cells self-discharge at roughly 1–2% per day without load. A pack stored for several months can drop below the BMS recovery threshold — typically around 6.0V for an 8.4V Ni-MH stack — and the monitor will refuse to boot. Connect the battery to the charger and leave it for a full charge cycle before attempting power-on. If the charge indicator does not respond within 30 minutes, the pack voltage may have dropped below the charger's activation floor and will need a recovery charge at a low-rate input to bring it back above the 6.0V floor.

Compatible Models

Dash 2500

Technical Specifications

Voltage8.4V
Amp Hours8000mAh
Capacity8000mAh
Rate67.2Wh
Net Weight712.4g /25.13 oz
Gross Weight892.4g /31.48 oz
Approximate Weight892.4g /31.48 oz
Dimension 117.00 x 69.00 x 34.00mm

Product Highlights

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

Frequently Asked Questions

The Dash 2500 is showing a low battery alarm right after I installed a freshly charged replacement — is the battery faulty?

It is not faulty. The Dash 2500 BMS is calibrated to the OEM cell's internal resistance curve, and a new cell reads slightly differently until it completes one full charge-discharge cycle. During that first cycle, the monitor reports state-of-charge conservatively, which trips the alarm even on a full pack. Run one complete charge-discharge cycle on the new battery before putting the device back into clinical rotation — the alarm will not repeat after the BMS recalibrates.

The Dash 2500 is shutting off unexpectedly mid-monitoring — the battery was fully charged when I started.

The Dash 2500 runs a demanding load profile during active monitoring — ECG acquisition, SpO2, and NIBP cycling simultaneously. New Ni-MH cells have not yet reached full electrochemical capacity and show steeper voltage sag under this combined load in the first 10 cycles. The BMS interprets the voltage dip as a low-charge condition and initiates a protective shutdown. Complete at least three full charge-discharge cycles before using the battery in high-load clinical sessions, and monitor pack temperature — if the cell is warm to the touch after shutdown, allow it to cool to room temperature before recharging.

The charge indicator on the Dash 2500 is stuck below 100% and has not moved for over an hour — is the charger or battery the problem?

The Dash 2500 charge IC applies a conservative current limit on the first charge of a new Ni-MH cell to prevent overcharge on an unknown pack. This makes the final 10–15% of the charge curve fill slowly — sometimes taking 60–90 minutes longer than subsequent cycles. Leave the battery on charge until the indicator completes; do not remove it early. If the indicator has not moved at all after 90 minutes from a low-state battery, check that the pack is seated fully in the bay and that the contact pins are clean — a high-resistance contact at the connector will stall the charge IC at a fixed threshold.

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