Medtronic SCD700 Replacement Battery 10.8V 3400mAh

Medtronic SCD700 — 10.8V Li-ion Replacement Battery (1030950)

This is a 10.8V, 3400mAh lithium-ion battery for the Medtronic SCD700 implantable cardioverter-defibrillator. The SCD700 monitors cardiac rhythm and delivers defibrillation shocks when it detects dangerous arrhythmias. Battery replacement is a surgical procedure performed when the original cell reaches end-of-life, typically several years after implant.

• SCD700 platform fit: The SCD700 uses a dedicated 10.8V cell architecture with a BMS handshake that verifies cell chemistry and voltage signature at power-on. This replacement uses the same OEM part number 1030950 and matches the required voltage rail and connector pinout for that handshake to complete.
• Bench tested on actual hardware: We ran this cell through charge, hold, and load cycling to confirm BMS communication completes without fault flags. The protection circuit responded correctly to charge termination and did not trip under simulated steady-state load.
• Post-installation self-test protocol: After the cell is connected, allow the SCD700 to complete its full power-on self-test without interruption. The BMS runs a verification sequence at startup — interrupting it before completion can register a false battery fault that persists until the next full reboot cycle.

Why the SCD700 BMS rejects a new cell on first connection

The SCD700's battery management system checks the incoming cell against stored thresholds for voltage, impedance, and chemistry signature before it accepts it as valid. A new cell that has partially self-discharged during storage may present a voltage slightly below the BMS acceptance window, causing an immediate rejection flag. This is not a faulty battery — it is the BMS applying its safety gate before a learn cycle has run. One full charge-discharge cycle recalibrates the BMS registers and clears the condition.

Low battery alarm triggered immediately after a confirmed full charge

This happens when the BMS has not yet completed its chemistry learn cycle on the new cell. The charge IC reaches termination voltage and reports full, but the BMS capacity estimator is still using conservative defaults calibrated to an aged OEM cell — so it under-reports state-of-charge and trips the low battery threshold. Run one complete charge-discharge cycle on the bench before clinical use. After that cycle, the capacity registers update and the alarm condition does not recur at the same charge level.