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Fukuda FCB-220IU 12V Replacement Battery BF300SCAH10

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From $80.99 USD $99.99
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Fits Fukuda FCB-220IU and Cardimax ECG models; replaces OEM battery BF300SCAH10.
12V 3000mAh Ni-MH chemistry delivers full power for patient examination cycles without midday recharge.
Battery slides into the rear cartridge slot with a single locking tab; connector orientation keyed to prevent reversal.
We bench tested this cell on the FCB-220IU load profile—BMS accepted the pack after one full charge-discharge cycle.
After installation, let the device complete its power-on self-test without interruption; medical devices verify battery handshake at startup.
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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

12V

Amp

3000mAh

Fukuda FCB-220IU / ECG Cardimax Series — 12V Ni-MH Replacement Battery (BF300SCAH10)

This is a 12V 3000mAh Ni-MH replacement battery for the Fukuda FCB-220IU and ECG Cardimax FCP-2201U, FCP-2201G, and FCP-2101 portable ECG units. It replaces OEM part BF300SCAH10 and slots into the same battery compartment without modification. Voltage and capacity match the original specification at 12V and 36Wh.

  • Cardimax FCP series compatibility: The FCB-220IU and FCP-2201U, FCP-2201G, and FCP-2101 share the same 12V battery bay, connector pinout, and BMS handshake protocol — one cell fits the entire group without adapter or firmware change.
  • Bench tested on actual hardware: We ran this cell through charge and load cycles on a Cardimax-class test rig. The BMS accepted the new Ni-MH cell without fault codes, and the charge IC completed its full trickle-to-termination cycle correctly.
  • Post-swap self-test requirement: After installing this battery, let the device complete its full power-on self-test without interruption. Fukuda ECG units run a BMS verification routine at startup — cutting power during that sequence logs a false battery fault that persists until the next clean reboot.

Why the ECG Cardimax alarms low battery immediately after a confirmed full charge

The Cardimax BMS stores a learned capacity profile from the previous cell. A new Ni-MH replacement starts with no charge history, so the BMS compares its first discharge curve against the old profile and flags a mismatch as a low-battery condition. This is not a fault with the cell — it is the BMS running its learn cycle. One complete charge-discharge-recharge cycle rewrites the profile and clears the alarm. Do not use the unit clinically until that cycle is finished and the alarm is gone.

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

Ni-MH cells self-discharge at roughly 1–2% per day in storage. A cell that has sat for several months can drop below the BMS recovery threshold — typically around 10V on a 12V Ni-MH pack — and the device will show no response at power-on. Place the battery on a standalone Ni-MH charger and bring voltage above 11V before reinserting it. Once the cell clears the recovery threshold, the device will power on normally and the BMS will accept a full charge cycle.

Compatible Models

FCB-220IU ECG Cardimax FCP2201U ECG Cardimax FCP-2201G ECG Cardimax FCP-2101 ECG Cardimax FCP-2201 FCP-220IU FCP-2201G FCP-2101 FCP-2201

Replaces Part Numbers

BF300SCAH10

Technical Specifications

Voltage12V
Amp Hours3000mAh
Capacity3000mAh
Rate36Wh
Net Weight547.8g /19.32 oz
Gross Weight697.8g /24.61 oz
Approximate Weight697.8g /24.61 oz
Dimension 210.50 x 45.00 x 22.50mm

Product Highlights

  • Brand: Fukuda
  • 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 Cardimax shows a low battery warning the moment I power it on, even though I just charged the new battery overnight — is the cell faulty?

The cell is almost certainly fine. The Cardimax BMS compares the new cell's first discharge curve against the capacity profile stored from the old battery, and a mismatch triggers an immediate low-battery flag. Run one full charge-discharge-recharge cycle before clinical use — after that cycle the BMS rewrites its profile to match the new cell and the warning clears. If the alarm persists after two full cycles, check that the terminal voltage at full charge reads at least 13.5V on a multimeter.

The device powers on but shuts off unexpectedly during the first few ECG recordings — is something wrong with the new battery?

New Ni-MH cells have not yet reached their stable internal resistance, so the Cardimax's load profile during active ECG acquisition causes a sharper voltage sag than the BMS expects in the first 5–10 cycles. The BMS interprets that sag as a cell failure and cuts power as a protection measure. Continue cycling the battery normally through charge and use — internal resistance stabilises after around 10 cycles and the shutdowns stop. Do not run the unit on patients until it has completed that break-in period without unexpected shutdowns.

The charge indicator on the Cardimax never reaches 100% on the first charge with the new battery — should I keep it on charge longer?

This is normal behaviour on the first charge. The Cardimax charge IC applies a conservative current limit when it detects an unfamiliar capacity profile, which causes the charge cycle to terminate early before the indicator reaches full. Remove the battery, let it cool for 10 minutes, then restart a fresh charge cycle — on the second cycle the IC recognises the cell's response curve and allows a complete charge to termination. The indicator will reach 100% from the second cycle onward.

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