Bilirubinometer Airshields 103 Compatible Battery 2.4V 800mAh

Bilirubinometer Airshields 103 / Minolta JM103 — 2.4V Ni-MH Replacement Battery

This is a 2.4V 800mAh Ni-MH replacement battery for the Airshields 103 and Minolta JM103 bilirubinometers. These are portable neonatal jaundice analyzers used in clinical settings to measure bilirubin levels in newborn blood. The cell matches the original voltage, capacity, and physical footprint at 45 x 22 x 10mm.

• Airshields 103 and Minolta JM103 compatibility: Both devices share the same battery bay geometry, 2.4V supply rail, and BMS handshake protocol. One cell fits both platforms without modification to contacts or firmware thresholds.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Airshields 103 platform. The BMS accepted the cell, completed voltage verification, and did not flag a chemistry mismatch on any test unit.
• Post-swap self-test protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. The BMS runs a voltage verification routine at startup. Interrupting that sequence generates a false battery fault that sticks until the next clean reboot from a fully charged state.

Charge indicator not reaching 100% on the first charge after installation

The Airshields 103 charge IC applies a conservative current limit when it detects a new or cold cell. On the first charge cycle, the algorithm may terminate early rather than push to full capacity. This is a charge IC behaviour, not a cell defect. Run one complete charge-discharge cycle and the charge IC recalibrates its endpoint. After that first cycle, the indicator should reach 100% and hold.

Device alarms low battery immediately after a confirmed full charge

The BMS stores a capacity baseline from the previous cell. A new 800mAh Ni-MH cell reads differently on the voltage curve than a degraded original, and the BMS can misread this as a fault. The alarm clears once the device completes one full charge-discharge learn cycle. Charge fully, run the device through a normal session until it reaches the low-battery cutoff, then recharge to 100% — the threshold recalibrates at 2.4V nominal on completion.