MTC 968 Replacement Battery 3.7V 1750mAh Li-ion

MTC 968 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1750mAh Li-ion cell built to replace the original battery in the MTC 968 smartphone. It fits the 968 directly and matches the original voltage rail and connector. Capacity is 1750mAh (6.48Wh), sourced from the product specification — not estimated from a third-party listing.

• MTC 968 fit: The 968 runs a 3.7V single-cell architecture. This replacement matches that voltage rail and connector pinout exactly, so the charge IC and fuel gauge IC receive the signal handshake they expect on first boot.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the bench. The BMS held charge termination at the correct cutoff voltage and did not trigger overcurrent protection during a simulated screen-on load draw.
• First-cycle fast charge tip: On first use after installation, disable fast charging and complete one full discharge-charge cycle at standard rate. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging is applied to an uncalibrated cell.

Sudden shutdown at 20–30% on a replacement cell

This is a voltage cliff problem, not a capacity problem. Under modem activity or screen-at-max-brightness load, the cell voltage drops sharply below the threshold the OS uses to predict remaining charge. The phone shuts down before the display percentage reaches zero because the fuel gauge IC is still calibrated to the old cell's discharge curve. One full discharge-charge cycle at standard rate resets the coulomb counter and corrects the shutdown point.

Phone will not power on after the battery sat discharged in storage

If a Li-ion cell drops below approximately 2.5V per cell, the BMS enters a protection lockout and blocks normal charge current. The phone appears completely dead — no boot logo, no charge indicator. Connect the phone to a wall adapter rated at 5V/1A or higher and leave it for 15–20 minutes before pressing the power button. The charge IC trickle-charges the cell back above the BMS wake threshold, typically around 2.8–3.0V, before allowing full charge current to resume.