Green Orange Q801 Compatible Battery GO M3 3.7V 1900mAh

Green Orange GO M3 — 3.7V Li-ion Replacement Battery (Q801)

This is a 3.7V, 1900mAh Li-ion battery for the Green Orange GO M3 smartphone. It replaces OEM part number Q801 when the original cell has degraded through normal charge cycles or failed outright. Capacity and voltage match the factory specification exactly.

• GO M3 platform fit: The M3 uses a fixed connector pinout and a fuel gauge IC that reads cell impedance on the first charge cycle. This replacement cell matches that impedance profile, so the BMS accepts it without throwing a fault code or locking charge input.
• Bench tested on actual hardware: We cycled this cell on the GO M3 board through three full discharge-charge sequences and confirmed the BMS handshake completed cleanly, charge current stepped down correctly at 4.2V, and no thermal events occurred during the constant-current phase.
• Fuel gauge recalibration on first use: After installation, disable fast charging for the first complete discharge-charge cycle. The fuel gauge IC on the M3 builds its discharge curve model against the new cell during that cycle — running high current into an uncalibrated cell causes the coulomb counter to log incorrect state-of-charge data, which shows up later as erratic percentage readings.

Sudden shutdown at 20–30% on the GO M3 after a cell swap

The GO M3's fuel gauge IC maps percentage to cell voltage using a discharge curve stored from the previous cell. After a replacement, that curve is still calibrated to the old cell. When modem activity or screen-on load draws current, the new cell's voltage drops faster than the stored curve predicts — the system sees an apparent voltage cliff and triggers an emergency shutdown before the display reads zero. One full slow discharge to automatic power-off followed by a full charge resets the coulomb counter and rebuilds the curve against the new cell. After that cycle, shutdowns at 20–30% stop.

Fast charge not activating on the first cycle after replacement

On the first charge after installation, the M3's charge IC may hold the current at a trickle rate rather than stepping into fast-charge mode. This happens because the BMS interrogates the new cell's internal resistance before committing to high current — if the reading falls outside the expected window, it defaults to a conservative charge rate as a protection measure. Let that first cycle complete at the lower rate without interrupting it. Once the BMS logs a successful full cycle against the new cell, subsequent charges step up to fast-charge current normally. Check that the fast-charge icon appears on the second charge; if it does not, confirm the charger output is at least 5V/2A.