MTC 950 Compatible Battery 3.7V 1300mAh Li-ion

MTC 950 — 3.7V Li-ion Replacement Battery

This 3.7V, 1300mAh Li-ion cell replaces the original battery in the MTC 950 smartphone. It covers the full power draw for calls, messaging, and active app use. Dimensions are 54.00 × 43.00 × 5.00mm — confirm fitment against your existing cell before installation.

• MTC 950 fit: This cell matches the voltage rail and physical footprint the MTC 950 mainboard expects. The connector orientation and BMS communication lines align with the stock charging IC, so the phone recognises the cell on first boot.
• Bench tested on actual hardware: We ran charge and discharge cycles on this cell and monitored BMS handshake behaviour. The protection circuit held cutoff at the expected low-voltage threshold and accepted charge current without tripping into fault mode.
• Fuel gauge recalibration after swap: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins on an uncalibrated counter.

Sudden shutdown at 20–30% on the MTC 950 after a cell swap

This happens because the phone's fuel gauge IC is still reading the discharge curve of the old, degraded cell. The new cell has a steeper voltage drop under modem and screen load near the lower end of its charge window. The phone interprets that voltage sag as a dead battery and cuts power before the cell is actually empty. One full discharge cycle — letting the phone run down to auto-shutdown, then charging uninterrupted to 100% — lets the coulomb counter recalibrate to the new cell's actual curve.

Phone feels warm near the battery during the first few charges

A new cell starts with higher internal impedance than a broken-in one. During the first two or three charge cycles, the charge IC pushes current into that higher resistance, generating more heat than usual. This is not a fault — impedance drops as the cell cycles. If the case stays warm beyond the third full charge, check that nothing is covering the phone during charging, and confirm the charger output matches the 5V rail the MTC 950 expects.