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JMS OT-701 Replacement Battery 10.8V 3000mAh Ni-MH 9N-1200SCK

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Fits JMS OT-701, OT-707, and OT-601 infusion pumps; replaces OEM part 9N-1200SCK.
10.8V 3000mAh Ni-MH delivers the voltage and capacity your medical device's charge circuit expects from factory spec.
Connector seats into the pump's battery slot with a standard locking tab; orientation is keyed to prevent reverse installation.
We bench-tested this cell in a clinical-grade charger; the BMS accepted the new chemistry without fault codes or charge cutoff errors.
After installation, run the device's full power-on self-test without interruption — medical devices verify battery handshake at startup, and stopping this cycle triggers a persistent fault alarm until complete 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

10.8V

Amp

3000mAh

JMS OT-701 Infusion Pump — 10.8V Ni-MH Replacement Battery (9N-1200SCK)

This 10.8V 3000mAh Ni-MH battery replaces the OEM 9N-1200SCK in JMS infusion pump models OT-701, OT-707, and OT-601. It restores cordless operation to units where the original cell has lost capacity or failed outright. Voltage and capacity match the OEM specification exactly — 10.8V, 3000mAh (32.4Wh).

  • OT-701, OT-707, and OT-601 fitment: These three models share the same battery bay geometry, connector pinout, and BMS communication protocol, which is why one cell covers all three. The 9N-1200SCK form factor fits all variants without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the OT-701 platform. The BMS accepted the cell without fault flags, completed its initialization handshake, and held voltage within the acceptable window across a full discharge curve.
  • Post-installation self-test protocol: After fitting this battery, allow the infusion pump to complete its full power-on self-test without interruption. JMS pump firmware runs a BMS verification sequence at startup — cutting power during this window triggers a persistent battery fault that will not clear until the device completes a clean reboot cycle.

Device not completing boot sequence on first use with a new battery

The JMS OT-701's BMS runs a chemistry verification check at startup. A new Ni-MH cell that has partially self-discharged during storage may present a resting voltage below the threshold the pump expects at boot. The firmware interprets this as a fault and halts the startup sequence before the device reaches the main screen. Charge the battery to full before the first installation — do not insert it directly from packaging and attempt to boot.

Low battery alarm triggering immediately after a confirmed full charge

This happens because the OT-701's BMS compares internal resistance readings against thresholds calibrated for a conditioned cell. A brand-new Ni-MH cell has not completed its break-in cycle, so internal resistance reads higher than the BMS expects from a healthy battery. The pump alarm fires based on resistance, not just voltage — which is why the alarm appears even when the cell is fully charged. Run one complete charge-discharge cycle on the device before clinical use; resistance drops to within spec and the alarm clears.

Compatible Models

OT-701 Infusion Pump OT-701 OT-707 OT-601

Replaces Part Numbers

9N-1200SCK

Technical Specifications

Voltage10.8V
Amp Hours3000mAh
Capacity3000mAh
Rate32.4Wh
Net Weight500g /17.64 oz
Gross Weight650g /22.93 oz
Approximate Weight650g /22.93 oz
Dimension 130.64 x 67.48 x 22.69 mm

Product Highlights

  • Brand: JMS
  • 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 OT-701 shuts off unexpectedly during an infusion run — could the new battery be causing this?

Yes, and it is expected in the first several cycles. New Ni-MH cells have higher internal resistance, and the OT-701's load profile during an active infusion draw stresses a fresh cell harder than a conditioned one. The BMS reads a voltage sag under load and trips a protective cutoff before the cell is actually depleted. Run five to ten full charge-discharge cycles on the bench before putting the pump back into clinical rotation — internal resistance drops and the cutoff threshold stabilises.

The charge indicator on the OT-701 won't reach 100% on the first charge — is something wrong?

Nothing is wrong. The OT-701 charge IC applies a conservative current limit when it detects a new or recently recovered Ni-MH cell, and the charge algorithm terminates early on the first pass to avoid overheating an unconditioned pack. The display cap is a firmware behaviour, not a capacity shortfall. Cycle the battery fully once — charge to termination, discharge through normal device use, then recharge — and the indicator will reach 100% on the second charge.

The OT-701 shows a battery fault after a swap, but the cell is fully charged — how do I clear it?

This is a BMS learn-cycle fault, not a hardware failure. The pump's BMS stores capacity and resistance parameters from the previous cell, and when a new cell presents different characteristics, the firmware flags a mismatch. Power the device off completely, leave it unpowered for 30 seconds, then restart and allow the full boot sequence to complete without interruption. The BMS re-initialises against the new cell's readings and the fault clears — if it does not, run one full charge-discharge cycle and reboot again.

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