Alcatel TLi013C1 One Touch Go Flip Replacement Battery 3.7V 1200mAh

Alcatel One Touch Go Flip — 3.7V Li-ion Replacement Battery (TLi013C1)

The TLi013C1 is a 3.7V Li-ion cell rated at 1200mAh (4.44Wh), built to replace the original battery in the Alcatel One Touch Go Flip and related flip phone models. It fits the OT-4043S, OT-4044T, and OT-4044N, among others. Install it when the original cell no longer holds a usable charge through a normal day of calls and messaging.

• Go Flip platform fit: The OT-4043S, OT-4044T, and OT-4044N share the same battery bay dimensions and connector pinout. All use the TLi013C1 form factor — 57.65 x 42.82 x 4.80mm — with the same 3.7V nominal voltage rail and BMS communication protocol across the lineup.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Go Flip unit. The BMS handshake initialised correctly, charge termination triggered at the expected cutoff voltage, and the protection circuit responded cleanly to over-discharge conditions.
• Fuel gauge recalibration on first use: After installing this cell, disable fast charging and run one complete discharge down to automatic shutoff, then charge fully without interruption. The fuel gauge IC on the Go Flip calibrates its coulomb counter against the new cell's discharge curve on that first full cycle — skipping this step causes erratic percentage readings.

Why the Go Flip reports wrong battery percentage after a cell swap

The Go Flip's fuel gauge IC builds its charge model from the previous cell's discharge history stored in firmware. When a new cell goes in, that model no longer matches the actual cell chemistry. The IC keeps using the old curve, so the percentage shown on screen drifts from the true state of charge. One full discharge-to-shutoff followed by a complete uninterrupted charge resets the coulomb counter and aligns the gauge to the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under the load of an active call or screen wake — a voltage cliff the fuel gauge didn't predict. The gauge shows 20–30% because it was tracking average voltage, not the cell's behaviour under peak draw. At that load spike, voltage sags below the BMS cutoff threshold and the phone shuts off instantly. To confirm the cell is healthy, check resting voltage with a meter — a good cell at 30% charge should read approximately 3.6–3.7V at rest.