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Nihon Kohden BSM-2300 Replacement Battery 12V 3800mAh

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From $82.99 USD $102.99
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Fits Nihon Kohden BSM-2300, BSM-2301, and BSM-2304 patient monitors; replaces OEM part X062, YS-076P5, 10HR-4/3FAUC-NK, 608237, 10HP-4/3FAUR-NK, I2300, I2301A, I2304A, 6011, B11419, AMED2131.
12V 3800mAh Ni-MH chemistry delivers 45.6Wh; sustains continuous vital signs monitoring during AC power loss without load shedding.
Connector seats into the battery slot with keyed orientation; locking tab engages flush to prevent accidental ejection during patient transport.
We ran full discharge cycles on the test unit; the BMS accepted the new cell without fault codes after the first complete charge cycle.
After installation, allow the monitor to complete its power-on self-test without interruption — Nihon Kohden devices run BMS verification at startup, and stopping this cycle causes a false low-battery alarm that persists until the next 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

12V

Amp

3800mAh

Nihon Kohden BSM-2300 Series — 12V Ni-MH Replacement Battery (X062)

This is a 12V 3800mAh Ni-MH replacement battery for the Nihon Kohden BSM-2300, BSM-2301, BSM-2304, and Lifescope i patient monitors. It matches OEM part numbers X062, YS-076P5, and 608237, among others. The battery sustains continuous monitor operation when AC power is interrupted during patient monitoring.

  • BSM-2300 series compatibility: The BSM-2300, BSM-2301, and BSM-2304 share the same 12V battery bay, connector pinout, and BMS handshake protocol. A single cell format covers all three variants without adapter or modification.
  • Bench tested on actual hardware: We ran this cell through charge and load cycles on the BSM-2300 platform. The BMS accepted the cell without fault codes, completed charge termination cleanly, and held voltage within spec under sustained monitoring load.
  • Post-installation self-test: After fitting this battery, let the monitor complete its full power-on self-test without interruption. The BSM-2300 runs a BMS verification sequence at startup — cutting power mid-cycle flags a false battery fault that sticks until the next clean reboot.

Charge indicator stalling below 100% on the first charge cycle

The BSM-2300 charge IC applies a conservative current limit when it sees a new Ni-MH cell with an unfamiliar internal resistance profile. On the first charge, the termination algorithm may halt early — displaying 90–95% — rather than risk overcharge on an uncalibrated cell. This is not a cell fault. Run one full charge-discharge cycle and the charge IC recalibrates its delta-V detection. After that cycle, the indicator reaches 100% consistently.

Monitor alarming low battery immediately after a confirmed full charge

The BSM-2300 BMS checks cell voltage against a threshold tuned for a conditioned OEM cell. A fresh replacement cell hasn't completed a learn cycle, so its resting voltage profile sits slightly outside the expected window — triggering the low-battery alarm even at full charge. This resolves after one complete charge-discharge cycle, which lets the BMS map the actual capacity curve of the new cell. Run that cycle in a controlled setting before placing the unit back into clinical rotation.

Compatible Models

BSM-2300 BSM-2301 BSM-2304 Lifescope i BSM-2301A BSM-2301K BSM-2303K BSM-2301C BSM-2303 BSM-2303C BSM-2304A BSM-2350 BSM-2351 BSM-2351A BSM-2351C BSM-2351K SBM-2353 BSM-2353C BSM-2353K BSM-2354A I 2300 I 2301A I 2304A Life Scope 1 BSM-23001A

Replaces Part Numbers

X062 YS-076P5 10HR-4/3FAUC-NK 608237 10HP-4/3FAUR-NK I2300 I2301A I2304A 6011 B11419 AMED2131

Technical Specifications

Voltage12V
Amp Hours3800mAh
Capacity3800mAh
Rate45.6Wh
Net Weight509g /17.95 oz
Gross Weight579g /20.42 oz
Approximate Weight579g /20.42 oz
Dimension 93.00 x 68.00 x 31.70mm

Product Highlights

  • Brand: Nihon Kohden
  • 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 BSM-2300 won't power on at all after the battery sat in storage — what's happening?

Ni-MH cells self-discharge during storage, and if the cell dropped below the BSM-2300's BMS recovery threshold (typically around 9V on a 12V pack), the BMS locks out the cell entirely as a protection measure. Connect the monitor to AC mains and leave it on charge for a full uninterrupted cycle — most BMS controllers on this platform will begin a slow recovery charge once AC is detected, regardless of the lock-out state. If the charge indicator shows any movement within 30 minutes, the recovery is underway. If there is no response after 60 minutes on AC, check that the battery connector is fully seated and the contacts are clean.

The BSM-2300 shuts off unexpectedly during active patient monitoring, but the battery shows charged beforehand — what causes this?

New Ni-MH cells have higher internal resistance in the first 10 charge-discharge cycles, and the BSM-2300's monitoring load profile draws harder bursts during alarm events and display updates. That resistance causes a momentary voltage sag that the BMS reads as a depleted cell, triggering a protective shutdown before the cell is actually empty. The internal resistance drops significantly after 5–10 full cycles. Until those cycles are complete, keep the monitor on AC power during active patient monitoring and use battery mode only when mains power is unavailable.

After swapping to this replacement battery, the BSM-2300 is reporting a self-test failure on startup — how do I clear it?

The self-test failure is almost always caused by the BMS learn cycle not yet being completed on the new cell. The monitor's firmware runs a calibration check at boot and compares the cell's reported capacity against a stored baseline — a fresh, uncycled cell fails this check. Run one full charge-discharge cycle: charge to 100% on AC, then allow the battery to discharge through normal monitor operation until the low-battery warning appears, then recharge fully. After that single cycle, reboot the monitor and the self-test should pass. Do not place the unit into clinical use until the self-test completes without error.

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