Bolate A2 Medical Device Replacement Battery LB-02 3.7V

Bolate A2 / A3 / A4 / A5 Series — 3.7V Li-ion Replacement Battery (LB-02 / 12-100-0001)

This is a 3.7V 1800mAh Li-ion replacement battery for Bolate portable medical devices in the A2, A3, A4, and A5 series. It carries OEM part numbers LB-02 and 12-100-0001. The cell matches the voltage rail and connector footprint required by these monitoring and diagnostic units.

• A2–A5 platform compatibility: These models share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — which is why one cell covers all four variants. The protection circuit communicates with the device firmware at startup to confirm cell chemistry and nominal voltage before the device enters operating mode.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a monitored test rig. The BMS engaged overcurrent protection correctly at load, and the cell passed voltage verification at the 3.7V nominal threshold during startup communication with the device controller.
• Post-swap startup protocol: After installation, allow the device to complete its full power-on self-test cycle without interruption. Bolate A-series units run a BMS verification sequence at boot — cutting power mid-sequence stores a false battery fault flag that persists until the next complete cold reboot.

Device not completing boot sequence on new battery

Bolate A-series devices run a multi-stage power-on self-test that includes a BMS handshake at 3.2–3.7V. A new cell that has partially self-discharged during storage can sit just below the firmware's minimum boot threshold, causing the device to stall mid-sequence or loop back to the start screen. This is not a faulty cell — it is a low resting voltage issue. Charge the battery fully before the first installation attempt; the cell must present at or above 3.6V for the handshake to complete.

Low battery alarm triggers immediately after a confirmed full charge

The Bolate A-series BMS stores a capacity baseline from the previous cell and compares the new cell's first discharge curve against it. A fresh Li-ion cell has not yet established its full charge-acceptance profile, so the first one or two cycles read as lower capacity than actual. The device interprets this as a degraded cell and raises the low battery flag prematurely. Run one complete charge-to-discharge cycle before relying on the battery indicator for clinical decisions — by cycle two the BMS recalibrates and the alarm clears.