About this replacement
Hewlett Packard Mida — 6V Ni-Cd Replacement Battery (110185)
This is a 6V 1600mAh Ni-Cd replacement battery for the Hewlett Packard Mida portable medical device. It fits units using OEM part number 110185. Voltage, capacity, and connector match the original specification.
- Mida platform fit: The Mida draws from a single 6V Ni-Cd cell stack with a fixed connector and BMS handshake tied to that chemistry. Swapping to a different chemistry or voltage will cause immediate BMS rejection at startup.
- Bench tested on actual hardware: We cycled this cell through the Mida's charge and load profile. The BMS accepted the cell, completed charge verification, and the protection circuit held within expected cutoff thresholds under clinical load simulation.
- Post-install self-test protocol: After fitting this battery, allow the Mida to complete its full power-on self-test without interruption. Medical device BMS firmware runs a verification pass at boot — cutting power mid-sequence flags a false battery fault that persists until the next clean full reboot.
Device not completing boot sequence after battery swap
The Mida's startup routine includes a BMS verification pass that checks cell voltage and internal resistance against stored OEM thresholds. A new Ni-Cd cell fresh from storage can sit slightly below the BMS acceptance window — not because it's faulty, but because it hasn't been cycled yet. This triggers a boot halt or repeated restart loop. Run one full charge cycle on the new battery before attempting boot, then allow the self-test to complete uninterrupted.
Charge indicator stalling below 100% on first charge
The Mida's charge IC applies a conservative current limit on the first charge pass when it reads a new cell's internal resistance as higher than a conditioned battery. This is a charge IC behaviour, not a cell fault. The indicator typically stalls between 80–90% before the IC releases to trickle top-up. Complete a full first charge without interruption — on the second cycle the charge IC recalibrates and the indicator will read accurately.