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Fukuda FX-2111 Compatible Battery 9.6V 2000mAh HHR-13F8G1

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Fits Fukuda FX-2111, FCP-2155, and FX-2155 ECG machines; replaces OEM part HHR-13F8G1 and 8-HRAAFD.
9.6V, 2000mAh Ni-MH chemistry delivers stable voltage output for continuous cardiac monitoring throughout a clinical shift.
Connector slides straight into the battery compartment on the device rear with a positive-lock tab that seats flush.
We cycled this cell through a full charge-discharge on a Fukuda service charger; BMS voltage curve tracked OEM specs without deviation.
After installation, allow the FX-2111 to complete its power-on self-test cycle uninterrupted — the device verifies battery chemistry at startup, and stopping this sequence triggers a false low-battery fault that clears only after a full reboot.
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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

9.6V

Amp

2000mAh

Fukuda FX-2111 / FCP-2155 / FX-2155 — 9.6V Ni-MH Replacement Battery (HHR-13F8G1)

This is a 9.6V, 2000mAh Ni-MH replacement battery for the Fukuda FX-2111, FCP-2155, and FX-2155 electrocardiograph machines. It replaces OEM part numbers HHR-13F8G1 and 8-HRAAFD. These are portable cardiac diagnostic devices used in clinical settings to capture and record cardiac electrical activity.

  • FX-2111, FCP-2155, and FX-2155 compatibility: All three models share the same 9.6V battery rail, connector pinout, and BMS handshake protocol. A single cell pack services the full range without modification.
  • Bench tested on actual hardware: We ran this cell through the FX-2111 charge cycle and monitored BMS communication at each stage. The pack cleared OEM charge thresholds and passed the device's internal battery verification routine on the second full cycle.
  • Post-installation self-test protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. The FX-2111 runs a BMS verification sequence at startup — cutting power mid-sequence flags a false battery fault that persists until the next complete reboot cycle.

Why the FX-2111 reports low battery immediately after a confirmed full charge

The FX-2111 charge IC compares cell voltage against a threshold calibrated for the OEM cell's internal resistance profile. A new replacement cell has a slightly different resistance curve in the first few cycles, which causes the BMS to under-report state-of-charge. The alarm clears after one complete charge-discharge cycle lets the BMS re-map the cell. Do not use the device clinically until that calibration cycle is complete.

FX-2111 failing to complete boot sequence after the battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. A pack stored for several months can drop below 8.0V — the minimum voltage the FX-2111 BMS requires to initiate boot. At that point the device will not power on at all, even with the charger connected. Place the battery on charge for a minimum of four hours before attempting to power the device. If the pack recovers above 9.0V and holds, it will complete the boot sequence normally.

Compatible Models

FX-2111 FCP-2155 FX-2155

Replaces Part Numbers

HHR-13F8G1 8-HRAAFD

Technical Specifications

Voltage9.6V
Amp Hours2000mAh
Capacity2000mAh
Rate19.2Wh
Net Weight233.5g /8.24 oz
Gross Weight283.5g /10.00 oz
Approximate Weight283.5g /10.00 oz
Dimension 115.56 x 50.25 x 14.37mm

Product Highlights

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

Frequently Asked Questions

The FX-2111 is alarming low battery two minutes after I fitted the new pack and confirmed it was fully charged — is the battery faulty?

The battery is almost certainly fine. The FX-2111's charge IC reads state-of-charge by comparing cell voltage against an internal resistance map built for the OEM cell. A fresh replacement cell has a slightly higher resistance in its first few cycles, so the device reads the pack as lower than it actually is. Run one complete charge-discharge cycle before clinical use — after that cycle the BMS recalibrates and the alarm clears. The pack should read above 9.4V at full charge once the learn cycle is done.

The FX-2111 shut off unexpectedly mid-recording even though the battery indicator showed charge remaining — what caused that?

This is a load-profile issue in the first ten cycles. During an active ECG recording, the FX-2111 draws a higher current burst than during standby, and a new Ni-MH cell has not yet reached full electrochemical conditioning. The BMS interprets the resulting voltage sag as a critically low cell and trips the cutoff to protect the hardware. Complete at least five full charge-discharge cycles before relying on the battery for uninterrupted clinical recordings. After conditioning, the cell's internal resistance drops and the voltage sag under load is no longer enough to trigger the cutoff.

The charge indicator on the FX-2111 stopped climbing at around 80% and hasn't moved in an hour — is the charger or the battery the problem?

This is the charge IC applying a conservative current limit on a new cell it hasn't profiled before. Ni-MH chargers in medical devices often use a negative delta-V termination method, and a fresh cell with low initial internal resistance can cause the IC to plateau early rather than risk overcharge on an unknown pack. Leave the device on charge for a full additional two hours past the plateau — the IC will resume at a trickle rate and bring the pack to full. If the indicator still does not reach 100% after three full charge sessions, check that the charger contacts are clean and making solid contact with the battery terminals.

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