TLp031C2 Alcatel One Touch Hero 2 Replacement Battery 3.8V 3100mAh

Alcatel One Touch Hero 2 / OT-8030 Series — 3.8V Li-Polymer Replacement Battery (TLp031C2)

This 3.8V, 3100mAh Li-Polymer cell replaces the original battery in the Alcatel One Touch Hero 2, OT-8030, OT-8030Y, and OT-8030B. It matches OEM part numbers TLp031C2 and TLP031C1. Physical dimensions are 84.21 × 56.74 × 4.17mm — measure your original before installing if you are unsure of your exact variant.

• OT-8030 series compatibility: The OT-8030, OT-8030Y, and OT-8030B share the same battery bay dimensions, connector pinout, and BMS handshake protocol. All variants draw from the same 3.8V nominal voltage rail, so one cell covers the entire OT-8030 line without modification.
• Bench tested on actual hardware: We ran this cell through full charge-discharge cycles on an OT-8030 unit. The BMS accepted charge from the native charge IC without tripping overcurrent protection, and the fuel gauge IC reported state-of-charge consistently once the coulomb counter completed its first full cycle.
• First-cycle calibration tip: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.

Why the One Touch Hero 2 reports wrong battery percentage after a cell swap

The OT-8030 uses a coulomb-counting fuel gauge IC that builds its state-of-charge model from the previous cell's charge and discharge history. When you install a new cell, that stored model no longer matches the actual cell chemistry and impedance. The gauge will read anywhere from 5 to 20 percentage points off until it relearns the curve. One full discharge to 3.0V followed by a complete charge cycle resets the model and restores accurate readings.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff, not a capacity problem. Under modem transmission or screen-on load, current draw spikes sharply and cell voltage drops below the BMS cutoff threshold — even though the fuel gauge still shows charge remaining. A fresh Li-Polymer cell at higher impedance than a warm, cycled cell is most vulnerable in the first ten cycles. After the cell beds in and the fuel gauge recalibrates, the cutoff point typically drops back below 10%. If shutdowns persist past cycle 15, check that the battery connector is fully seated — a partial connection raises contact resistance and accelerates the voltage drop under load.