OSEN OIP-900 Medical Monitor Replacement Battery 11.1V 3350mAh

OSEN OIP-900 — 11.1V Li-ion Replacement Battery (JHOTA-990-00)

This 11.1V, 3350mAh Li-ion battery replaces the JHOTA-990-00 cell in the OSEN OIP-900 portable patient monitor. The OIP-900 is used in clinical settings to track heart rate, SpO2, and blood pressure at the bedside. Voltage and capacity match OEM spec to keep the monitor running through its normal load cycle.

• OIP-900 platform fit: The OIP-900 runs a 3-cell 11.1V rail with a BMS that checks cell voltage balance at startup. This replacement uses matched cells wired to the same connector and voltage profile, so the monitor's charge IC and BMS handshake correctly from first boot.
• Bench tested on actual hardware: We cycled this cell through charge, load, and low-battery threshold tests. The BMS held cutoff within spec, the charge indicator stepped through all stages without error, and the protection circuit tripped cleanly at the expected undervoltage point.
• Post-swap startup protocol: After installing this battery, let the OIP-900 complete its full power-on self-test without interruption. The BMS runs a verification check at startup — cutting power during that sequence logs a battery fault that persists until the next full reboot cycle.

Why the OIP-900 won't complete its boot sequence on a new battery

The OIP-900 reads cell voltage at startup and compares it against a minimum threshold before allowing the OS to load. A new cell that has self-discharged during storage can sit below that threshold even though the battery isn't depleted. If the monitor stalls on the boot screen, connect AC power and allow a full charge before attempting to power on from battery alone. Once the cell reaches the monitor's minimum voltage floor, the boot sequence completes normally.

Charge indicator stuck below 100% on the first charge cycle

The OIP-900's charge IC applies a conservative top-off current when it first encounters a new cell — it doesn't know the cell's internal resistance profile yet. This causes the charge percentage to plateau in the high 90s and hold there longer than expected. This is normal behaviour on cycle one. Run one complete charge-discharge-recharge cycle and the charge IC recalibrates, after which the indicator reaches 100% consistently.