Alcatel TLi013A1 One Touch Pixi 4 3.5 Compatible Battery 3.7V

Alcatel One Touch Pixi 4 3.5 — 3.7V Li-ion Replacement Battery (TLi013A1)

This is a 3.7V, 1300mAh Li-ion cell replacing the TLi013A1 or TLi013A7 original battery in the Alcatel One Touch Pixi 4 3.5. It fits OT-4017F, OT-4017, and OT-4017A variants alongside four additional OT-4017 sub-models. At 52.00 × 48.00 × 4.68mm, it matches the original footprint and connector exactly.

• OT-4017 series compatibility: All OT-4017 variants share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail. The BMS handshake on each model reads cell voltage and temperature from the same two-wire interface, so one cell works across the full lineup without modification.
• Bench tested on actual hardware: We ran this cell through the OT-4017F charge controller and confirmed the BMS accepted the new cell without triggering a protection trip. Charge current ramped normally from pre-charge trickle through constant-current to constant-voltage cutoff at 4.2V.
• Fuel gauge recalibration on first use: After installation, let the phone discharge fully until it powers off, then charge uninterrupted to 100% before using it normally. This gives the fuel gauge IC one complete reference cycle against the new cell's discharge curve — skipping it causes percentage jumps or early shutoffs in the first few days.

Why the Pixi 4 3.5 reports wrong battery percentage after a cell swap

The OT-4017's fuel gauge IC builds its percentage model from the discharge curve of whichever cell it last fully cycled. When a new cell goes in, that stored curve belongs to the old, degraded battery. The IC maps voltage readings onto the wrong reference, so 3.85V might show as 45% on one boot and 62% on the next. One full discharge-to-shutdown followed by an uninterrupted charge to 4.2V forces the coulomb counter to reset and write a new curve. After that single calibration cycle, percentage reporting stabilises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem transmits or the screen brightness spikes — both pull current fast enough to drag cell voltage below the BMS cutoff threshold before the fuel gauge catches up. On the Pixi 4 3.5, the BMS trips at approximately 3.0V under load, but the resting voltage at 25% might be 3.65V, making the shutdown look premature. A degraded or freshly installed uncalibrated cell has higher internal resistance, which amplifies the voltage sag during those load spikes. Run the calibration cycle described above first; if shutdowns continue past that point, check that the battery connector tab is fully seated — a loose contact raises effective resistance further.