Medsonic MSCPR-1A Compatible Battery 11.1V 3400mAh

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

This 11.1V 3400mAh lithium-ion battery replaces part number B0402095 in the Medsonic MSCPR-1A portable medical device. It matches the original voltage rail, connector, and BMS communication protocol required by this clinical equipment. Capacity is 3400mAh (37.74Wh), identical to the factory specification.

• MSCPR-1A platform fit: The MSCPR-1A runs a dedicated BMS handshake at startup that checks cell chemistry and voltage signature. This cell matches the 11.1V three-cell Li-ion configuration the device expects, so the handshake completes without a fault flag.
• Bench tested on actual hardware: We cycled this battery through charge, full load discharge, and BMS re-initialisation on the MSCPR-1A platform. The protection circuit responded correctly to load transitions and the charge IC accepted the cell without error codes.
• Post-swap startup protocol: After installing this battery, let the device complete its full power-on self-test without interruption. The MSCPR-1A runs a BMS verification sequence at boot — cutting power mid-sequence trips a false battery fault that persists until the next complete reboot.

Device not completing boot sequence after battery swap

The MSCPR-1A runs a multi-stage BMS verification during boot that checks cell voltage, internal resistance, and chemistry ID. A new cell fresh from storage may sit at a resting voltage slightly outside the range the device expects on first power-on, causing the boot sequence to stall or loop. This is not a defective cell — it is the device's safety logic rejecting an unverified cell. Connect the charger, allow a full charge cycle to complete, then power on again.

Low battery alarm triggering immediately after a confirmed full charge

The MSCPR-1A sets its low-battery alarm threshold against a calibrated capacity baseline stored in the BMS. On a new cell, the BMS has no learned baseline yet, so it defaults to a conservative threshold that can trigger the alarm even when the cell is fully charged. One complete charge-discharge cycle gives the BMS enough data to recalibrate the threshold. Run that cycle before placing the device back in clinical rotation.