Alcatel OT-8008D Replacement Battery TLp025A2 3.8V 2500mAh

Alcatel OT-8008D / One Touch Scribe HD — 3.8V Li-Polymer Replacement Battery (TLp025A2)

This 3.8V, 2500mAh Li-Polymer cell replaces the original TLp025A2 battery in the Alcatel OT-8008D and One Touch Scribe HD. It also fits the OT-8008X and OT-8000 series, which share the same connector pinout and charge profile. Dimensions are 73.10 × 54.13 × 4.40mm — confirm your tray depth before ordering.

• OT-8008 series fit: The OT-8008D, OT-8008X, and OT-8000 family all use the same 3.8V charge rail and identical flex-tab connector, so one cell covers the full range. The BMS handshake is the same across variants — no firmware conflict.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OT-8008D platform. The BMS accepted the charge IC handshake on the first connection, and protection cutoffs triggered correctly at both the high and low voltage thresholds.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins — skipping this step often causes erratic percentage readings for the first several cycles.

Sudden shutdown at 20–30% on the OT-8008D after a cell swap

This is a voltage cliff issue, not a defective cell. The Alcatel OT-8008D's modem and display draw a combined current spike that the fuel gauge IC cannot anticipate until it has mapped the new cell's actual discharge curve. If the coulomb counter is still calibrated to the old, degraded cell, it will miscalculate remaining capacity and let voltage drop below the BMS cutoff threshold — triggering an abrupt shutdown even though the percentage display shows charge remaining. Run one full discharge to near-zero and a complete charge before trusting the percentage indicator. After that cycle, the gauge recalibrates and shutdowns at false percentages stop.

Phone feels warm near the battery compartment during the first charge

A new Li-Polymer cell has higher internal impedance than a broken-in cell. During the first charge cycle, the charge IC pushes current into that higher-impedance cell, which generates more heat than normal — this is expected and temporary. Keep the phone on a hard, flat surface during the first full charge to allow heat to dissipate evenly. If the device becomes uncomfortably hot to hold or the charger pulls above 5V/2A on a USB meter, disconnect and let it cool to room temperature before resuming. By the second or third cycle, impedance drops and warmth returns to normal levels.