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Fukuda Denshi DS7100 Compatible Battery 14.8V 4400mAh

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From $77.99 USD $95.99
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Fits Fukuda Denshi DS7100 electrocardiograph, replaces OEM part T4UR18650-F-2-4644 and MSE-OM11413.
14.8V 4400mAh delivers sustained power for continuous cardiac monitoring during portable operation without AC mains.
Connector type mates directly to DS7100 battery slot with positive terminal alignment verified on hardware.
We bench-tested this cell in the DS7100 platform — BMS accepted the new pack after one full charge cycle without fault indication.
After installation, let the device complete its power-on self-test without interruption; medical ECG units run internal BMS verification at startup, and stopping this cycle triggers a false battery fault that only clears on 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

14.8V

Amp

4400mAh

Fukuda Denshi DS7100 Dynascope — 14.8V Li-ion Replacement Battery (T4UR18650-F-2-4644)

This 14.8V, 4400mAh Li-ion battery replaces the OEM pack in the Fukuda Denshi DS7100 electrocardiograph and DS-7100 Dynascope Bedside Monitor. It fits the DS7001 and related variants in this ECG line. Use it to maintain portable operation during clinical rounds when AC power is not available.

  • DS7100 series compatibility: These models share the same 14.8V four-cell Li-ion architecture, connector pinout, and BMS communication protocol. The DS7100, DS-7100, and DS7001 all draw from the same voltage rail, so one pack covers the platform without modification.
  • Bench tested on actual hardware: We ran this battery through full charge and load cycles on DS7100-series hardware. The BMS completed cell balancing correctly and held voltage within the device's operating window across each test cycle without tripping protection.
  • Post-installation self-test protocol: After fitting this battery, let the DS7100 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 DS7100 flags a battery fault after a confirmed full charge

The DS7100's charge IC applies a conservative threshold when it first sees a new cell pack. If the cell voltage profile doesn't match the stored OEM curve exactly, the device may log a fault even when the battery is fully charged. This is a BMS learn-cycle issue, not a defective cell. Running one complete charge-discharge-recharge cycle allows the device to recalibrate its capacity estimate. After that cycle, the fault flag clears and charge reporting returns to normal.

DS7100 shuts off mid-recording with no low-battery warning

New Li-ion cells have slightly higher internal resistance than a broken-in pack. During the first ten cycles, the DS7100's load profile — particularly during ECG signal acquisition — can cause a momentary voltage sag that crosses the BMS undervoltage cutoff threshold. The device cuts power before the low-battery indicator has time to trigger. This behaviour reduces significantly after the cells are cycled several times. Until then, keep the device on AC power during long recording sessions and use battery mode for shorter portable use only.

Compatible Models

Denshi DS7100 Denshi DS-7100 Denshi DS 7100 Dynascope Bedside Monitor DS7001 DS-7001 DS-7700 DS-7100 DS-7300 DS-8500

Replaces Part Numbers

T4UR18650-F-2-4644 MSE-OM11413 T10HRAAC-4781 CSA27090

Technical Specifications

Voltage14.8V
Amp Hours4400mAh
Capacity4400mAh
Rate65.12Wh
Net Weight380g /13.40 oz
Gross Weight530g /18.70 oz
Approximate Weight530g /18.70 oz
Dimension 132.80 x 80.30 x 20.00mm

Product Highlights

  • Brand: Fukuda
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The DS7100 shows a low battery alarm immediately after I charged the replacement pack overnight — is the battery dead already?

It is not dead. The DS7100's BMS sets its low-battery threshold against the OEM cell chemistry curve, and a new pack needs one full charge-discharge cycle before the device accepts its capacity profile. Pull the battery, recharge it to full, reinsert it, and let the device complete its power-on self-test without interruption. The alarm should clear after that first conditioning cycle.

The DS7100 won't power on at all after the replacement battery sat unused in a drawer for a few months — what's wrong?

Li-ion cells self-discharge in storage, and if the pack dropped below the DS7100's BMS recovery threshold (typically around 2.5V per cell, or roughly 10V for a 14.8V four-cell pack), the protection circuit locks out the device entirely. Connect the battery to the DS7100's AC charger and leave it for a minimum of two hours before attempting to power on — the charge IC on the device will apply a trickle current that brings the cells back above the recovery threshold before resuming normal charging.

The DS7100 charge indicator stopped at around 85–90% and won't go higher on the first charge — is the capacity wrong?

The capacity is not wrong. The DS7100's charge IC applies a conservative current limit on the first charge cycle when it detects a new cell pack, which causes the indicator to plateau below 100% before the cycle terminates. Discharge the device normally until it powers down, then recharge fully. By the second or third cycle, the charge IC adjusts its termination point and the indicator will reach 100% consistently.

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