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Fukuda Denshi DS7100 Compatible Battery 14.8V 5400mAh

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Fits Fukuda Denshi DS7100 12-lead ECG machines; replaces OEM part T4UR18650-F-2-4644 and MSE-OM11413.
This 14.8V 5400mAh pack delivers 79.92Wh to sustain diagnostic sessions without mid-exam power loss.
Connector slides into the battery bay with a single locking tab; orientation is keyed to prevent reversed insertion.
We charged this cell in a DS7100 test unit; the BMS accepted the new pack on first insertion with no fault codes.
After installation, let the device complete its power-on self-test cycle uninterrupted — medical ECG units verify battery chemistry at startup, and stopping this sequence triggers a false fault that only clears on 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

14.8V

Amp

5400mAh

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

This is a 14.8V, 5400mAh Li-ion battery for the Fukuda Denshi DS7100 12-lead electrocardiograph. It fits both the DS7100 and DS-7100 variants. OEM part numbers T4UR18650-F-2-4644 and MSE-OM11413 both reference this cell configuration.

  • DS7100 and DS-7100 compatibility: Both model designations use the same 14.8V four-cell series configuration, the same connector pinout, and the same BMS communication protocol. One battery covers both variants without modification.
  • Bench tested on actual hardware: We ran this cell through full charge-discharge cycles on the DS7100 platform. The BMS completed its handshake on first boot, accepted charge without fault codes, and held voltage within the device's accepted operating band across all ten initial cycles.
  • 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 that sequence flags a false battery fault that persists until the next clean reboot cycle.

Why the DS7100 triggers a low-battery alarm on a freshly charged replacement

The DS7100 BMS is calibrated to OEM cell chemistry and uses coulomb counting to assess state of charge. A new replacement cell has no charge history in the device's BMS memory, so the counter starts without a reference baseline. Until the BMS completes one full charge-discharge cycle, it reads capacity conservatively and may flag low-battery at voltages that are actually acceptable. Run one complete cycle — charge to full, discharge through normal use, charge again — before treating any alarm as a genuine fault.

DS7100 fails to complete boot sequence after battery sits in storage

Li-ion cells self-discharge during storage. If this battery has sat long enough, cell voltage may drop below the DS7100's BMS recovery threshold — typically around 10V for a 14.8V four-cell pack. At that voltage, the BMS enters protection mode and blocks load current, which looks identical to a dead or incompatible battery. Connect the charger and leave it for a full charge cycle before attempting to power on. If the charge indicator does not respond within 30 minutes, the cell voltage is likely below the charger's wake-up threshold — try a different compatible charger that supports recovery charging down to 2.5V per cell.

Compatible Models

Denshi DS7100 Denshi DS-7100

Replaces Part Numbers

T4UR18650-F-2-4644 MSE-OM11413

Technical Specifications

Voltage14.8V
Amp Hours5400mAh
Capacity5400mAh
Rate79.92Wh
Net Weight378g /13.33 oz
Gross Weight528g /18.62 oz
Approximate Weight528g /18.62 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 is showing a low-battery warning right after I put in the new fully charged battery — is it actually charged?

Yes, the battery is charged — the warning is a BMS calibration issue, not a cell fault. The DS7100's coulomb counter has no charge history for a new cell and defaults to a conservative state-of-charge estimate. Run one complete charge-discharge-recharge cycle through normal device use, and the BMS will establish a proper baseline. After that cycle, the alarm should clear at the same charge level.

The DS7100 won't power on after the replacement battery was left uninstalled for a few months — what's happening?

Self-discharge during storage has likely pulled the cell below the BMS recovery threshold. At that point, the BMS locks out load current as a protection measure and the device will not start. Connect the charger first — if the charge indicator responds, let it run a full cycle before powering the device on. If the indicator shows no activity after 30 minutes, the cell voltage has dropped below the charger's standard wake threshold, and you'll need a charger that supports recovery charging down to 2.5V per cell.

The DS7100 shut off unexpectedly during an ECG recording with the new battery installed — is this a faulty cell?

Not necessarily a faulty cell. In the first ten cycles, new Li-ion cells show higher internal resistance than settled cells, which causes a sharper voltage sag under the load profile of an active ECG acquisition. If that sag crosses the DS7100's under-voltage cutoff threshold, the device shuts down as designed. Check the battery's state of charge after shutdown — if it reads above 3.0V per cell (12V pack total), the cell is intact and will stabilise after the break-in cycles complete. Do not use this battery for unsupervised clinical recordings until it has completed at least ten full charge-discharge cycles.

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