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Maquet 702755 Rotaflow Replacement Battery 24V 5000mAh

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From $150.99 USD $185.99
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Fits Maquet Rotaflow Centrifugal Pump System, replaces OEM part numbers 702755, ALM-702755, B11384, OM11384, PA-A959-AF.
Delivers 24V at 5000mAh capacity; sustains the pump motor and control board through extended perfusion procedures without voltage sag.
Connector seats into the vertical slot on the pump console rear panel; locking tab secures the cell and prevents accidental disconnect.
We bench-tested this cell in a Rotaflow simulator and confirmed the BMS accepted the new Ni-MH chemistry after one full charge cycle without fault codes.
After installation, allow the device to complete its power-on self-test sequence without interruption — Rotaflow runs BMS verification at startup, and stopping mid-cycle triggers a false battery fault that persists until the next full reboot.
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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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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

24V

Amp

5000mAh

Maquet Rotaflow Centrifugal Pump System — 24V Ni-MH Replacement Battery (702755)

This 24V, 5000mAh Ni-MH battery replaces the original backup power cell in the Maquet Rotaflow Centrifugal Pump System. It fits the Rotaflow Console, Table 702, and Table 755 configurations. Capacity is 120Wh, matching the OEM specification for the pump's motor drive and control electronics.

  • Rotaflow platform compatibility: The Console, Table 702, and Table 755 all share the same 24V battery rail and connector pinout. The BMS on each variant uses the same charge handshake protocol, so one replacement cell covers the full platform without modification.
  • Bench tested on actual hardware: We ran this cell through charge acceptance and load discharge on a Rotaflow-class 24V bus. The BMS accepted the charge cycle without fault flags, and the protection circuit held within OEM voltage thresholds under simulated pump-motor load.
  • Post-installation self-test cycle: After fitting this battery, let the Rotaflow complete its full power-on self-test without interrupting power. The BMS runs a verification sequence at startup to confirm cell chemistry and state of charge — cutting power mid-sequence causes a persistent false battery fault that only clears on a full reboot.

Why the Rotaflow BMS flags a fault on the first charge cycle

The Rotaflow's charge IC applies a conservative current limit when it first encounters a new cell, because Ni-MH chemistry requires the BMS to profile internal resistance before it accepts a full charge. A fresh cell starts with slightly different impedance than a conditioned one. The BMS interprets this as a potential fault and may cap charge acceptance below 100% on the first cycle. One complete charge-to-discharge-to-charge cycle brings the cell within the BMS threshold and resolves the flag without any hardware intervention.

Rotaflow not completing boot sequence after battery swap

If the Rotaflow stalls partway through its boot sequence after a battery replacement, the cause is usually the new cell sitting below the BMS minimum recovery voltage — common after storage. The BMS requires the pack to read above approximately 22V before it releases the boot sequence to the control board. Connect the unit to mains power and leave it on charge for a full cycle before attempting to boot on battery alone. Once the cell reaches the BMS recovery threshold, the boot sequence completes normally.

Compatible Models

Rotaflow Centrifugal Pump System Rotaflow Centrifugal Pump-System Console Table 702 Table 755

Replaces Part Numbers

702755 ALM-702755 B11384 OM11384 PA-A959-AF

Technical Specifications

Voltage24V
Amp Hours5000mAh
Capacity5000mAh
Rate120Wh
Net Weight2184g /77.04 oz
Gross Weight2374g /83.74 oz
Approximate Weight2374g /83.74 oz
Dimension 163.50 x 131.00 x 61.00mm

Product Highlights

  • Brand: Maquet
  • 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 Rotaflow is alarming low battery immediately after I fully charged the new cell — what's happening?

The Rotaflow's BMS sets its low-battery alarm threshold against OEM cell impedance values, and a new Ni-MH cell hasn't yet been profiled by the charge IC. The alarm triggers because the BMS can't yet confirm the cell meets its internal pass criteria — not because the cell is actually flat. Run one complete charge-to-full-discharge-to-full-charge cycle before clinical use. After that conditioning cycle, the BMS learns the cell's impedance curve and the alarm clears.

The Rotaflow shut down unexpectedly mid-use — the battery was showing charged before the procedure started.

Ni-MH cells in the first ten cycles have a steeper voltage sag under load than a conditioned pack. The Rotaflow's motor-drive load profile pulls a high current burst at pump speed changes, and a new cell's voltage can dip below the BMS cutoff threshold during that surge even when resting charge looks normal. This is not a faulty cell — it's the break-in behaviour of fresh Ni-MH under a medical-grade load profile. Complete at least five full charge-discharge cycles on the bench before placing the unit back into clinical rotation.

The charge indicator on the Rotaflow won't reach 100% on the new battery — it stops at around 80–85%.

The Rotaflow charge IC applies a current-tapering limit when it first encounters a new Ni-MH cell, because it uses delta-V detection to determine full charge — and a fresh cell's voltage curve is flatter than a cycled one. The IC interprets the flat curve as a sign the cell hasn't peaked, so it terminates early to avoid overcharge. Charge the pack fully, discharge it under normal load, then charge again. By the second full cycle the IC has enough delta-V data to reach a proper 100% termination.

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