Bolate M800 Medical Device Replacement Battery 3.7V 1700mAh

Bolate M800 — 3.7V Li-ion Replacement Battery (12-100-0002)

This is a 3.7V, 1700mAh Li-ion replacement battery for the Bolate M800 portable medical device. It replaces OEM part numbers 12-100-0002 and LB-03. Capacity is 6.29Wh — use that figure, not the web-listed spec, when comparing cells.

• M800 and LB-03 platform fit: Both the M800 and LB-03 share the same single-cell 3.7V architecture, connector pinout, and BMS communication protocol — which is why one cell covers both. The BMS on these units handshakes with the battery at startup to confirm chemistry and charge state before allowing operation.
• Bench tested on actual hardware: We ran this cell through the M800 startup sequence and confirmed the BMS completed its initialization pass without triggering a fault. Charge acceptance across the first three cycles matched OEM charge curve parameters.
• Startup self-test cycle: After fitting this battery, let the M800 complete its full power-on self-test without interruption. The BMS runs a voltage and chemistry verification at boot — cutting power mid-sequence leaves a fault flag that persists until the next clean reboot, not because the battery is faulty.

Why the M800 alarms low battery with a freshly charged replacement installed

The M800 BMS uses a charge threshold calibrated to the OEM cell's internal resistance profile. A new replacement cell has a slightly different impedance signature until it completes one full charge-discharge cycle. Until that cycle runs, the BMS may read the state-of-charge conservatively and trigger a low-battery alarm even when the cell is at or near 4.2V. Run one complete charge cycle before clinical use to let the BMS recalibrate its threshold against the new cell.

Device will not power on after the replacement cell sat in storage

Li-ion cells self-discharge during storage. If the replacement cell drops below approximately 3.0V, the M800 BMS treats it as a deep-discharged or damaged cell and blocks startup as a protection measure. Place the battery on charge for at least 30 minutes before attempting to power on — this brings the cell above the BMS recovery threshold. Once the device powers on successfully, allow a full charge cycle to complete before use.