Air Shields-Vickers OM11158 Jaundice Meter Replacement Battery 4.8V 800mAh

Air Shields-Vickers JM102 Jaundice Meter — 4.8V Ni-MH Replacement Battery (OM11158)

This is a 4.8V, 800mAh Ni-MH replacement battery for the Air Shields-Vickers JM102 Jaundice Meter. It matches OEM part number OM11158 and fits the JM102 directly. The JM102 is a neonatal diagnostic device used in clinical settings to measure bilirubin levels in newborns.

• JM102 platform fit: The JM102 runs a 4.8V Ni-MH cell stack with a BMS that performs a chemistry-verification handshake at startup. This replacement matches that voltage rail and cell configuration exactly, so the device completes its power-on self-test without a battery fault flag.
• Bench tested on actual hardware: We cycled this cell through charge and discharge while monitoring BMS response. The protection circuit engaged correctly at low-voltage cutoff and accepted a full charge without triggering a fault condition. Capacity measured within spec across the first three cycles.
• First-use self-test protocol: After installing this battery, allow the JM102 to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-cycle causes a false battery fault that persists until the next complete reboot. Do not interrupt startup on the first power-on.

Why the JM102 rejects a new battery on the first self-test

The JM102 BMS checks cell voltage against a minimum threshold during its startup verification routine. A new Ni-MH cell shipped in storage state often sits at a resting voltage that falls just below that threshold — not because the cell is faulty, but because Ni-MH chemistry self-discharges during transit. The device reads this as a battery fault and blocks operation. Running one full charge cycle before first clinical use resolves this — the cell reaches the voltage level the BMS expects to see.

Charge indicator not reaching 100% on first charge after swap

The JM102 charge IC applies a conservative current limit when it first sees a new cell. This is a calibration behaviour — the charger has no stored capacity data for the new cell and defaults to a cautious ceiling. The indicator may stop at 80–90% on the first charge and report full on subsequent cycles once the charge IC has logged one complete cycle. Let the device complete a full charge-discharge-charge sequence before reading the indicator as clinically accurate. After that first cycle, the displayed charge level reflects actual cell state.