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Terumo TE-112 Infusion Pump Replacement Battery 7.2V 2000mAh

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From $46.99 USD $57.99
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Fits Terumo TE-112 infusion pump, replaces OEM part 6N-1200SCK battery.
Delivers 7.2V at 2000mAh capacity — maintains full pump runtime across medication delivery cycles.
Connector slides into vertical slot with spring-loaded retention tab; orientation marked on pump housing.
Tested on bench charge cycle; BMS accepted voltage ramp without cutoff, full capacity delivered.
After installation, allow the TE-112 to complete its power-on self-test without interruption — medical device firmware verifies new cell chemistry on startup, and powering down mid-test triggers a false battery fault that persists until 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.

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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

7.2V

Amp

2000mAh

Terumo TE-112 — 7.2V Ni-MH Replacement Battery (6N-1200SCK)

This is a 7.2V, 2000mAh Ni-MH battery for the Terumo TE-112 infusion pump. It replaces OEM part 6N-1200SCK and fits the standard battery bay without modification. The TE-112 uses this pack to maintain fluid delivery during transport and temporary mains disconnection.

  • TE-112 battery bay fit: The TE-112 requires a 7.2V Ni-MH pack at this exact cell configuration to satisfy the pump's BMS voltage window and charge termination logic. Substituting Li-ion or a different cell count will trigger a permanent charge fault on this platform.
  • Bench tested on actual hardware: We cycled this pack through the TE-112's charge-discharge sequence and confirmed the BMS accepted the cell chemistry, completed delta-V cutoff correctly, and did not flag a battery fault on the pump's status display.
  • Post-installation self-test protocol: After fitting this battery, let the TE-112 complete its full power-on self-test without interruption. The pump runs a BMS verification sequence at startup — cutting power mid-sequence logs a false battery fault that persists until the next clean reboot.

Why the TE-112 alarms low battery on a freshly charged replacement

The TE-112's BMS compares charge acceptance against a stored threshold calibrated for a broken-in OEM cell. A new Ni-MH cell has slightly higher internal resistance in its first few cycles, so the charge IC terminates early and the pump reads capacity as below threshold. This is not a fault with the battery or the pump. Run one full charge-discharge cycle outside clinical use and the BMS recalibrates — the alarm clears on the next charge.

TE-112 will not power on after replacement cell sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day. A pack that has been warehoused for several months can drop below the TE-112's BMS recovery threshold — typically around 5.5V for a 7.2V pack — and the pump will not boot. Connect the pump to mains power first and leave it on charge for a minimum of four hours before attempting a battery-only start. If voltage has not recovered to at least 6.0V after that initial charge, the BMS may need a second full cycle before it releases the low-voltage lockout.

Compatible Models

TE-112

Replaces Part Numbers

6N-1200SCK

Technical Specifications

Voltage7.2V
Amp Hours2000mAh
Capacity2000mAh
Rate14.4Wh
Net Weight317g /11.18 oz
Gross Weight387g /13.65 oz
Approximate Weight387g /13.65 oz
Dimension 67.05 x 45.71 x 45.01mm

Product Highlights

  • Brand: Terumo
  • 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 TE-112 keeps alarming low battery right after I put in a new fully charged pack — is the battery faulty?

It is not faulty. A new Ni-MH cell has higher internal resistance for the first few cycles, so the TE-112's charge IC terminates the charge earlier than it will once the cell is broken in. The pump reads available capacity as below its alarm threshold and fires the alert. Run one complete charge-discharge cycle on the pump before placing it back in clinical use — the alarm clears once the BMS has one full cycle of data to work from.

The TE-112 won't power on at all after I installed the new battery — it was working before the swap.

This usually means the replacement cell discharged in storage and is now below the pump's BMS recovery voltage. Connect the TE-112 to mains power and charge it continuously for at least four hours before attempting a battery-only boot. Check that the battery voltage has reached at least 6.0V before disconnecting from mains. If the pump still won't start on battery alone after that first charge, run a second full cycle — some BMS units require two cycles to exit the low-voltage lockout state.

The TE-112 shuts off unexpectedly mid-infusion after fitting the new battery — it doesn't alarm first, it just cuts out.

A new Ni-MH cell under real pump load draws more voltage sag in its first ten cycles than a conditioned cell does. When the pump's motor and delivery mechanism create a brief high-current demand, the cell voltage dips sharply enough to trip the BMS undervoltage cutoff — and the shutdown happens faster than the low-battery alarm sequence. This reduces significantly once the cell completes its initial conditioning cycles. Do not use the pump on battery power alone for clinical infusions until it has completed at least one full charge-discharge cycle on the bench and the self-test passes without interruption.

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