GIONEE M3 BL-N5000A Replacement Battery 3.85V 5000mAh

GIONEE M3 / M4 Series — 3.85V Li-Polymer Replacement Battery (BL-N5000A)

This is a 3.85V, 5000mAh Li-Polymer replacement battery for the GIONEE M3, M3s, M4, and M3S Marathon TD-LTE Dual SIM. It carries OEM part number BL-N5000A and slots into the same battery bay without modification. Capacity matches the original cell at 19.25Wh.

• M3 / M3s / M4 platform fit: These models share the same battery bay dimensions, voltage rail at 3.85V nominal, and BMS connector pinout — a single cell covers the range without rewiring or adapters.
• Bench tested on actual hardware: We cycled this cell on a GIONEE M3 unit and confirmed the BMS handshake completed correctly, charge termination triggered at 4.35V, and low-voltage cutoff engaged at 3.0V under load without fault flags.
• Fuel gauge recalibration on first use: On first installation, disable fast charging and run one full discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before it begins tracking percentage against an uncalibrated baseline.

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

A new cell has a slightly different internal impedance profile than the worn cell the fuel gauge IC was calibrated against. Under peak load — screen at full brightness, modem active, GPS running — voltage sags faster than the IC predicts. The phone hits the hardware low-voltage threshold before the OS percentage reaches zero. One full discharge-charge cycle at standard rate gives the coulomb counter enough data to relearn the curve and push the shutdown point back to the correct level.

Phone not powering on after the replacement battery sat in storage

Li-Polymer cells self-discharge in storage. If voltage drops below roughly 2.5V per cell, the BMS enters lockout to prevent damage and the phone will not respond to the power button. Connect to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing anything. Most BMS circuits will accept a trickle charge at this state and exit lockout once the cell climbs back above 3.0V, after which normal boot resumes.