About this replacement
Reichert iPac — 3.7V Li-ion Replacement Battery (16042)
This 3.7V, 1150mAh Li-ion cell replaces the original battery in the Reichert iPac portable rebound tonometer. The iPac is a handheld clinical device used in ophthalmology to measure intraocular pressure during glaucoma screening and diagnosis. Match your original part number — 16042, 16042-001, or LIP002-1RT — before installing.
- iPac platform fit: The iPac runs a single-cell 3.7V Li-ion configuration with BMS handshake verification at power-on. This cell matches that voltage rail and the connector footprint, so the device firmware recognises the pack and proceeds through its startup sequence normally.
- Bench tested on actual hardware: We cycled this cell through charge and load profiling consistent with the iPac's measurement draw. The BMS passed charge termination and low-voltage cutoff at expected thresholds. No fault flags were triggered after a full conditioning cycle.
- Post-swap self-test protocol: After installation, let the iPac complete its full power-on self-test without interruption. The device runs a BMS verification pass at startup — cutting power during this sequence can latch a false battery fault that persists until the next clean reboot.
iPac not completing boot sequence on new battery
The iPac performs a BMS handshake during boot to verify cell chemistry and minimum state of charge. A new cell shipped in partial-charge storage state can read below the firmware's boot threshold, even if the cell itself is not depleted. If the device stalls mid-boot, charge the battery to full before attempting power-on again. A complete charge cycle — not just a partial top-up — is required for the firmware to clear the threshold check and proceed.
Low battery alarm triggering immediately after a confirmed full charge
The iPac's charge IC applies a conservative voltage threshold when it first encounters a new cell — the BMS has not yet profiled the cell's internal resistance or charge curve. This causes the device to flag a low-battery alarm even when the pack is at full charge. Run one complete charge-discharge-charge cycle before clinical use. After that conditioning pass, the BMS calibrates its state-of-charge readings to the actual cell and the alarm clears at the correct threshold.