Mobiado Professional 3.7V Replacement Battery 1200mAh Li-ion

Mobiado Professional Series — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1200mAh Li-ion cell that replaces the original battery in the Mobiado Professional, Professional CAMO, and Professional EM. All three models share the same battery form factor: 53.00 × 33.90 × 5.70mm with a matched voltage rail. Capacity is rated at 4.44Wh.

• Professional, Professional CAMO, Professional EM compatibility: These three variants share an identical battery bay, connector pinout, and 3.7V supply rail. Swapping between models is not an issue — the cell and BMS interface are the same across the series.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Professional platform. The BMS accepted the charge cycle without fault, and cutoff voltage at both ends of the curve matched OEM spec.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the Mobiado Professional reports wrong battery percentage after a cell swap

The fuel gauge IC in the Professional uses a coulomb counter calibrated to the original cell's discharge curve. A new cell has a different internal resistance profile, so the counter's reference points no longer match real charge state. The phone will display inaccurate percentages — sometimes jumping or plateauing — until the IC relearns the curve. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% to force a recalibration cycle.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff issue, not a capacity fault. Under screen-on or call load, the cell voltage drops sharply below the BMS cutoff threshold even though the reported percentage still looks safe. It happens most on a new cell that hasn't been through a calibration cycle — the fuel gauge IC is using stale reference data. Run one full discharge-to-shutdown cycle, then charge to 100%; the cutoff events should stop once the IC maps the new cell's voltage curve correctly.