Bistos BT-710 Pulse Oximeter Compatible Battery 3.7V 3000mAh

Bistos BT-710 Pulse Oximeter — 3.7V Li-Polymer Replacement Battery (20-0200025-00)

This 3.7V, 3000mAh lithium-polymer battery is a direct replacement for the Bistos BT-710 portable pulse oximeter. It fits the finger-mounted clinical unit used to measure blood oxygen saturation and heart rate in both hospital and home monitoring settings. Capacity matches the OEM specification at 3000mAh (11.1Wh).

• BT-710 platform fit: The BT-710 runs a single-cell Li-Polymer pack at 3.7V nominal. The physical cell dimensions — 82.00 × 49.80 × 6.00mm — and the BMS connector pinout are specific to this model. Fitting a cell outside these dimensions stresses the housing and risks connector misalignment.
• Bench tested on actual hardware: We cycled this cell through the BT-710's charge IC and confirmed the BMS accepted the new cell without fault flags. The protection circuit tripped correctly at low-voltage cutoff and recovered cleanly on reconnect to charge.
• Post-swap self-test protocol: After installing this battery, let the BT-710 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window logs a false battery fault that persists until the next clean reboot.

Device not completing boot sequence on new battery

The BT-710 runs a self-test at every power-on that includes a battery state check. A new cell that hasn't completed its first full charge-discharge cycle may report a state-of-charge figure the BMS flags as inconsistent. This causes the boot sequence to stall or loop. Run one complete charge to 100%, then discharge the unit through normal use before relying on it clinically — after that cycle the BMS has enough data to pass the startup check cleanly.

Low battery alarm firing immediately after a confirmed full charge

This happens when the BT-710's charge IC applies a conservative upper limit on a new cell's first charge, leaving it at roughly 95–97% capacity rather than a true full charge. The device alarm threshold is calibrated to the OEM cell's charge curve, so a new cell at 95% can fall just inside the alarm band. One full charge-discharge cycle recalibrates the internal coulomb counter. After that cycle, charge the unit fully and confirm the indicator holds steady before use.