Medsonic MSCPR-1A 11.1V Replacement Battery B0402095

Medsonic MSCPR-1A — 11.1V Li-ion Replacement Battery (B0402095)

This 11.1V 2600mAh (28.86Wh) lithium-ion battery replaces part number B0402095 in the Medsonic MSCPR-1A portable medical device. It matches the original voltage rail, capacity, and connector configuration. If the original cell has degraded after repeated charge cycles, this replacement restores normal device operation.

• MSCPR-1A platform fit: The MSCPR-1A runs a fixed 11.1V three-cell Li-ion architecture. The BMS expects a specific charge termination voltage and current profile — this cell matches those parameters so the charge IC does not flag a chemistry mismatch or refuse to complete the charge cycle.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the MSCPR-1A platform. The BMS completed handshake without fault codes, and the charge indicator progressed to 100% with no termination errors on the second cycle.
• Post-swap self-test procedure: After fitting this battery, allow the MSCPR-1A to complete its full power-on self-test sequence without interruption. The device runs BMS verification at startup — cutting power during this sequence triggers a false battery fault that persists until the next complete reboot.

Device not completing boot sequence on new B0402095 replacement

The MSCPR-1A runs a BMS learn cycle during initial boot that calibrates to the new cell's internal resistance and charge state. A cell shipped in storage may arrive below the device's boot-threshold voltage, causing the startup sequence to stall or abort before completing. This is not a faulty cell — it is a low state-of-charge condition. Connect the device to mains power before attempting to boot, and allow the battery to charge to at least 50% before running on battery alone.

Charge indicator stalls below 100% on first charge

On the first charge cycle, the MSCPR-1A charge IC applies a conservative current limit to an unrecognised cell — this is intentional behaviour, not a fault. The indicator may sit at 90–95% for an extended period before the IC confirms the cell has passed its acceptance threshold. Do not interrupt this charge. Run one complete charge-discharge-charge cycle and the indicator will reach 100% normally from the second cycle onward.