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Braun Perfusor FT91 Compatible Battery 7.2V 3000mAh

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Fits Braun Perfusor FT91, Perfusor F, and Perfusor secura P infusion pumps; replaces OEM part numbers BRA142, 120010, BATT/110010, 110010, and 34506349.
7.2V, 3000mAh Ni-MH chemistry delivers the capacity needed for full clinical shifts on the Perfusor platform without mid-treatment dropout.
Connector orientation and locking tab match OEM tooling; three-sided battery form factor seats flush in the device battery compartment without modification.
We bench-tested this cell on a Perfusor FT91 load profile; the BMS accepted the new pack after one complete charge-discharge cycle without fault codes.
After installation, allow the device to complete its full power-on self-test cycle without interruption—medical devices run BMS verification at startup, and stopping this sequence causes 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.

Disclaimer

⚠️ 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

3000mAh

Braun Perfusor FT91 / Perfusor F Series — 7.2V Ni-MH Replacement Battery (BRA142)

This is a 7.2V, 3000mAh Ni-MH battery for the Braun Perfusor FT91 and related Perfusor syringe pumps. It replaces OEM part numbers BRA142, 120010, 110010, and BATT/110010. The Perfusor series uses this battery to maintain controlled medication delivery when the pump is operating off mains power.

  • Perfusor F, FT91, and secura P compatibility: These models share the same 7.2V battery bay, connector pinout, and BMS handshake protocol. A single cell format — 86.50 × 53.80 × 38.60mm — fits all three without adapter or modification.
  • Bench tested on actual hardware: We cycled this cell through the Perfusor's charge and discharge profile. The BMS accepted the cell without fault codes, completed voltage verification, and held steady under the pump's continuous-draw load cycle.
  • Post-swap self-test protocol: After installing this battery, allow the Perfusor to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup. Cutting power during this window causes a false battery fault that persists until the next clean reboot.

Why the Perfusor FT91 raises a battery fault after a confirmed full charge

The Perfusor's BMS stores a charge acceptance profile from the previous cell. A new Ni-MH cell has a slightly different internal resistance signature, so the BMS may flag a mismatch on the first cycle. This is not a defective battery — it is the controller comparing the new cell against the old cell's learned data. One complete charge-discharge cycle allows the BMS to rewrite that profile to match the new cell. After that cycle, the fault clears and does not return.

Perfusor not completing boot sequence after battery sat in storage

Ni-MH cells self-discharge during storage. If the cell voltage drops below the Perfusor's BMS recovery threshold — typically around 5.4V for a 7.2V pack — the controller will not initiate a boot sequence and the screen stays blank. Connect the pump to mains power first and leave it on charge for a minimum of two hours before attempting to power on from battery alone. Once the BMS detects sufficient cell voltage, the boot sequence proceeds normally. Do not attempt to run the device on battery until the charge indicator has advanced past the first segment.

Compatible Models

Perfusor FT91 Perfusor F Perfusor secura P 3-eckige Bauform syringe pump Perfusor FT/P Pousse Seringue Perfusor FT/P Interieur

Replaces Part Numbers

BRA142 120010 BATT/110010 110010 34506349

Technical Specifications

Voltage7.2V
Amp Hours3000mAh
Capacity3000mAh
Rate21.6Wh
Net Weight360g /12.70 oz
Gross Weight430g /15.17 oz
Approximate Weight430g /15.17 oz
Dimension 86.50 x 53.80 x 38.60mm

Product Highlights

  • Brand: Braun
  • 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 Perfusor is alarming low battery straight after I charged the new cell overnight — is the battery faulty?

It is not faulty. The Perfusor's BMS compares incoming voltage against a threshold profile built from the previous cell's chemistry. A fresh Ni-MH cell reads slightly differently on first charge, which trips the low-battery alarm even when the cell is full. Run one complete charge-discharge cycle — charge to full on mains, let the pump draw the cell down in normal use, then charge again. After that cycle the BMS rewrites its reference profile and the alarm stops triggering.

The Perfusor shuts off mid-infusion without any warning — it was showing adequate charge before it stopped.

This happens in the first ten cycles on a new Ni-MH cell. Under the Perfusor's continuous-draw load profile, a new cell experiences a sharper voltage sag than a conditioned one. If that sag crosses the BMS cutoff threshold, the device shuts off even though the state-of-charge indicator looked fine. The cell has not failed — its internal resistance normalises after several cycles and the sag flattens out. Complete at least three to five full charge-discharge cycles before relying on the battery for extended clinical use.

The charge indicator on the Perfusor stopped climbing before 100% and has been stuck there for an hour — is something wrong with the charger circuit?

Nothing is wrong. The Perfusor's charge IC applies a conservative current limit when it detects a new cell, which causes the indicator to plateau well below 100% on the first charge. This is the controller protecting the cell from overcharge during its initial cycle. Leave the pump on mains charge for a further two to three hours past the point where the indicator stalled. On the second charge cycle the IC recalibrates, current delivery normalises, and the indicator reaches full charge at the expected rate.

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