About this replacement
Minolta Jaundice Meter 9404 / 102 — 4.8V Ni-MH Replacement Battery (110055)
This is a 4.8V, 500mAh Ni-MH replacement battery for the Minolta Jaundice Meter 9404 and Jaundice Meter 102. Both meters use transcutaneous photometry to screen newborns for jaundice without drawing blood. OEM part number 110055 is the reference cross for this cell.
- Jaundice Meter 9404 and 102 compatibility: Both models share the same 4.8V battery bay, connector pinout, and BMS handshake. A single cell format covers both units, so no adapter or wiring change is needed.
- Bench tested on actual hardware: We cycled this cell through the Jaundice Meter 9404 charge circuit and confirmed the BMS accepted the new cell without triggering a chemistry mismatch fault. The protection circuit responded correctly to charge termination at full capacity.
- Post-swap power-on self-test: After installing this battery, let the meter complete its full power-on self-test sequence without interrupting it. These meters run a BMS verification at startup, and cutting the sequence short locks in a false battery fault that won't clear until the next clean reboot.
Low battery alarm triggered immediately after a confirmed full charge
This is a known behaviour on the first one or two cycles with a new Ni-MH cell. The meter's BMS stores charge-acceptance data from the OEM cell and compares new cells against that baseline. A fresh cell hasn't built up the internal history the BMS expects, so it flags low battery even when voltage reads correctly. Run one full charge-discharge cycle before clinical use. After that cycle, the BMS recalibrates and the alarm clears at 4.8V charge completion.
Meter will not power on after the replacement cell sat in storage
Ni-MH cells self-discharge during storage. If the cell voltage has dropped below the meter's BMS recovery threshold — typically around 3.6V for a 4-cell pack — the device won't boot at all, even though the battery isn't dead. Connect the meter to the charger for a full charge cycle before attempting to power it on. Once voltage recovers above the BMS floor, the meter will boot normally and the self-test will proceed.