Alcatel One Touch Pop 4+ TLP025C1 Compatible Battery 3.8V 2000mAh

Alcatel One Touch Pop 4+ — 3.8V Li-Polymer Replacement Battery (TLP025C1)

This is a 3.8V, 2000mAh Li-Polymer battery for the Alcatel One Touch Pop 4+ and One Touch Pop 4 Plus (OT-5056D). It replaces OEM part numbers TLP025C1 and TLP025C2. Fit the replacement when the original cell no longer holds charge, causes unexpected shutdowns, or the phone will not power on at all.

• Pop 4+ and Allure series fit: These models share the same physical cell footprint (90.80 × 42.10 × 4.00 mm), voltage rail, and connector pinout. The BMS handshake expects 3.8V nominal — this cell meets that threshold, so the charge IC accepts it without triggering a reject fault.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the OT-5056D. The BMS accepted charge without triggering thermal cutoff, and the fuel gauge IC responded correctly after one full calibration cycle.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging is applied to an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still running the discharge curve from the old, degraded cell. When the modem transmits or the screen brightness spikes, current draw causes a voltage dip that the new cell's actual state of charge does not match on the old curve. The phone reads a safe percentage but the voltage drops below the cutoff threshold under load. One full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the coulomb counter to reset against the new cell — after that cycle, the shutdowns stop.

Phone not responding after the replacement battery sat in storage

Li-Polymer cells self-discharge in storage. If the cell voltage dropped below 2.5V, the BMS enters lockout mode to prevent damage — the phone will not power on and may show no charge indicator at all. Connect to a wall charger, not a PC USB port, and leave it for 20–30 minutes before attempting to power on. Once the cell recovers above 3.0V, the BMS releases lockout and the phone boots normally.