TLP034F1 Alcatel 3 2019 Replacement Battery 3.85V 3300mAh

Alcatel 3 2019 / 3L 2019 — 3.85V Li-Polymer Replacement Battery (TLP034F1)

This is a 3.85V, 3300mAh Li-Polymer cell that replaces the original TLP034F1 / TLP034F7 battery in the Alcatel 3 2019 and 3L 2019. It fits models 5053Y and 5053K. Use it when the original cell no longer holds a charge, swells, or causes unexpected shutdowns.

• Alcatel 3 2019 and 3L 2019 compatibility: Both the 5053Y and 5053K share the same battery bay dimensions and connector pinout, so one cell covers the full model range. The BMS communication protocol and charge IC handshake are identical across these variants.
• Bench tested on actual hardware: We ran charge and discharge cycles on this cell and confirmed the BMS holds the correct 4.40V charge ceiling, responds accurately to the Alcatel charge IC, and triggers undervoltage protection at the expected low-voltage threshold without false cutoff.
• 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 map the new cell's discharge curve before the charge IC pushes high current into an uncalibrated cell — otherwise percentage readings will drift from the first charge onward.

Sudden shutdown at 20–30% after a cell swap on the Alcatel 3 2019

The Alcatel 3 2019 runs a coulomb-counter fuel gauge that was trained to the discharge curve of the original cell. When a new cell goes in, the stored curve no longer matches the actual voltage profile. Under screen-on or modem load, voltage sags faster than the IC expects, and the phone interprets a safe voltage as critically low and cuts power. This is not a fault in the replacement cell. One full discharge to automatic shutdown followed by a full charge to 100% re-anchors the coulomb counter to the new cell's curve and eliminates the early cutoff.

Phone warm near the battery bay during the first few charges after replacement

A new Li-Polymer cell has slightly higher internal impedance than a cell that has completed its first few formation cycles. During the initial charges, the charge IC converts more energy to heat as it pushes current through that higher impedance. This is normal and tapers off after three to five full cycles as the cell's internal impedance drops. If the device stays warm beyond five full cycles or becomes hot to the touch, check that the replacement cell dimensions — 80.20 x 60.60 x 4.10mm — match the installed part, as a mismatched cell can cause sustained elevated impedance and heat.