BL-166 Gigabyte Gsmart Maya M1 Replacement Battery 3.7V 1700mAh

Gigabyte Gsmart Maya M1 — 3.7V Li-ion Replacement Battery (BL-166)

This is a 3.7V, 1700mAh Li-ion replacement battery for the Gigabyte Gsmart Maya M1 smartphone. It fits the original battery slot using the same form factor as the BL-166 OEM cell. Swap it in when the original cell no longer holds charge or causes unexpected shutdowns.

• Gsmart Maya M1 fit: The Maya M1 uses the BL-166 cell with a specific connector orientation and contact pitch matched to the phone's battery bay. This replacement uses the same physical layout, so the contacts seat correctly against the board terminals without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Maya M1 platform. The BMS accepted a standard charge current without flagging an error state, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• Fuel gauge recalibration on first use: After installing this cell, disable any fast-charge mode and complete one full discharge-to-charge cycle before normal use. The Maya M1's fuel gauge IC is calibrated to the old cell's discharge curve — one full cycle lets it map the new cell's characteristics before drawing high current.

Sudden shutdown at 20–30% on the Gsmart Maya M1

This is a voltage cliff problem, not a capacity problem. When the modem transmits or the screen peaks in brightness, current draw spikes sharply. If the cell's internal resistance is high — common in aged cells or a new cell not yet cycled — voltage drops below the protection circuit's cutoff threshold even though the fuel gauge still reads 20–30%. The phone shuts off to protect the hardware. One full discharge-charge cycle lowers apparent internal resistance and brings the fuel gauge's stored curve closer to the cell's actual discharge profile. After that cycle, check if the phone holds above 3.6V under load at the point it previously cut out.

OS reporting wrong battery percentage after cell replacement

The Maya M1's fuel gauge IC stores a learned discharge curve from the original BL-166 cell. A new cell has a different impedance profile, so the IC's percentage readings are mismatched from the moment you power on. The phone may report 80% and shut down, or sit at 1% long after it should have died. Run one complete discharge — down to automatic shutdown — followed by an uninterrupted charge to 100%. That single cycle forces the coulomb counter to reset its endpoints against the new cell and re-anchor the percentage readout to real capacity.