ICR18650-26F Medical Econet Compact 2 Replacement Battery 11.1V 2600mAh

Medical Econet Compact 2 / Compact 3 — 11.1V Li-ion Replacement Battery (ICR18650-26F)

This is an 11.1V, 2600mAh (28.86Wh) Li-ion replacement battery for the Medical Econet Compact 2 and Compact 3 portable medical devices. It matches the OEM part number ICR18650-26F and fits the original battery bay without modification. Voltage and capacity align with what the device BMS expects on startup.

• Compact 2 and Compact 3 platform fit: Both models run the same 11.1V three-cell Li-ion architecture with an identical connector pinout and BMS handshake protocol. One replacement covers both units without any configuration change.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Compact 2 platform. The BMS accepted the cell, completed its verification pass, and held charge within 2% of rated capacity at the end of the first full cycle.
• Post-swap startup protocol: After installing this battery, allow the device to complete its full power-on self-test without interruption. Medical Econet devices run a BMS verification sequence at boot — cutting power mid-sequence registers a false battery fault that persists until the next complete reboot.

Device not completing boot sequence after battery swap

The Compact 2 and Compact 3 run a multi-stage power-on self-test that includes a BMS interrogation cycle. A new cell with no prior charge history can return an inconclusive voltage signature during this interrogation, which the device interprets as a fault. This is not a defective battery — it is the BMS applying a conservative threshold against an uncycled cell. Run one full charge-discharge cycle before attempting clinical use, and the BMS will log a confirmed capacity baseline that clears the fault.

Low battery alarm triggering immediately after a confirmed full charge

This happens when the device's internal BMS compares resting cell voltage against a threshold calibrated to a seasoned OEM cell. A new ICR18650-26F cell holds voltage slightly differently in its first few cycles, and the delta can fall inside the alarm window even at full charge. The fix is one complete charge-discharge cycle run outside clinical duty — this allows the BMS to learn the new cell's voltage curve. After that cycle, the alarm threshold recalibrates and the low-battery warning clears at the correct state of charge. Confirm the resting voltage reads 12.4V or above before returning the device to service.