Schiller Cardiovit MS-2007 Compatible Battery 7.4V 4200mAh

Schiller Cardiovit MS-2007 — 7.4V Li-Polymer Replacement Battery (4.350044)

This 7.4V 4200mAh Li-Polymer battery replaces the OEM pack in the Schiller Cardiovit MS-2007 portable 12-lead ECG machine. It fits directly using OEM part references 4.350044, 88881115, and 110650-O. Capacity is sourced from product data — 31.08Wh total energy, matched to the MS-2007 voltage rail.

• Cardiovit MS-2007 compatibility: The MS-2007 uses a single Li-Polymer cell pack at 7.4V nominal. The BMS handshake checks cell chemistry and voltage at startup — this replacement matches both parameters, so the device completes its power-on self-test without throwing a battery fault.
• Bench tested on actual hardware: We cycled this pack through charge and load discharge on the MS-2007 platform. The BMS registered a valid cell on the first connection. Charge termination triggered correctly at full voltage without overcharge flags.
• Post-installation self-test protocol: After fitting this battery, allow the MS-2007 to complete its full power-on self-test cycle without interruption. Cutting power during that sequence can latch a false battery fault in the BMS that persists until the next clean reboot — not a cell fault, just an incomplete handshake.

Why the MS-2007 flags a battery error after a confirmed full charge

The Cardiovit MS-2007 BMS stores a learned capacity profile from the previous cell. A new Li-Polymer pack has a different internal resistance curve than a degraded OEM cell, so the BMS may flag an error or display an incorrect state-of-charge on the first few cycles. This is not a fault with the replacement cell — it is the BMS recalibrating against new chemistry data. Run one complete charge-discharge cycle before clinical use to let the BMS establish an accurate baseline. After that first cycle, charge indicators and low-battery thresholds will read correctly.

MS-2007 fails to power on after battery sat in storage

Li-Polymer cells self-discharge during storage. If voltage drops below approximately 6.0V, the MS-2007 BMS enters a deep-discharge lockout and will not pass power to the device even when connected to the charger. Place the battery on charge and leave it connected for a minimum of two hours before attempting to power the device on — the charge IC applies a low-current pre-charge phase to recover cells in this state. Once voltage climbs above the BMS recovery threshold (typically 6.8–7.0V on this platform), normal charging resumes and the device will boot.