MeiZu M6 Replacement Battery BA711 3.8V 3000mAh

MeiZu M6 Series — 3.8V Li-Polymer Replacement Battery (BA711)

This is a 3.8V, 3000mAh Li-Polymer replacement battery for the MeiZu M6 smartphone lineup. It fits the M6, M6 Dual SIM, M6 Dual SIM TD-LTE, and M711Q variants. Swap it in when the original BA711 cell can no longer hold a charge or shuts down unexpectedly under load.

• M6 variant compatibility: All listed M6 models share the same physical footprint, connector pinout, and BMS handshake protocol. The BA711 part number spans single-SIM and dual-SIM TD-LTE boards — the charge IC communicates identically across all three PCB revisions.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the M711Q board. The BMS accepted charge negotiation cleanly, reported state-of-charge correctly, and did not trigger overcurrent cutoff during display-on plus active cellular load.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state — skipping this step is the leading cause of erratic percentage readings after a cell swap.

Sudden shutdown at 20–30% on the M6 after a cell swap

This happens when the fuel gauge IC still holds the old cell's discharge curve in memory. The new cell has a steeper voltage cliff near 3.5V, and the modem or display pulls enough current to drop voltage below the BMS cutoff threshold before the percentage display reaches zero. The gauge reports 25% but the cell is already at 3.3V under load. One full discharge to automatic shutdown, followed by a standard-rate charge to 100%, forces the coulomb counter to resync to the new cell's actual capacity curve.

MeiZu M6 not powering on after the battery sat discharged in storage

Li-Polymer cells self-discharge in storage, and if the BA711 cell drops below approximately 2.5V per cell, the BMS enters lockout mode and blocks all charge input as a safety measure. The phone shows no charging indicator and appears completely dead. Connect the device to a low-current charger — 5V/500mA USB — and leave it for 15–20 minutes without pressing the power button. Once the BMS detects voltage recovering above the lockout threshold, it re-enables the charge path and the standard charging screen will appear.