Alcatel TLi018D1 Pop D5 Replacement Battery 3.7V 1600mAh

Alcatel One Touch Pop D5 — 3.7V Li-ion Replacement Battery (TLi018D1)

This is a 3.7V, 1600mAh Li-ion cell for the Alcatel One Touch Pop D5 and OT-5038 series smartphones. It replaces OEM part numbers TLi018D1 and TLi018D2. Fit models include the OT-5038, OT-5038A, and OT-5038E, among others sharing the same battery bay and connector spec.

• OT-5038 series compatibility: The OT-5038, OT-5038A, and OT-5038E all run on the same 3.7V single-cell rail with an identical connector pinout and BMS handshake protocol. One cell covers the entire sub-family.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OT-5038 platform. The BMS accepted the cell without fault flags, and the charge IC brought it to 4.2V termination cleanly on the first cycle.
• Fuel gauge recalibration on first use: Disable fast charging for the first complete discharge-charge cycle after installation. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins against an uncalibrated baseline.

Sudden shutdown at 20–30% on the Pop D5 after a cell swap

This is a voltage-cliff problem, not a capacity problem. The fuel gauge IC still references the old cell's discharge curve, so it reads 25% when the new cell's actual terminal voltage has already dropped below the modem's minimum operating threshold. Under screen-on or active call load, the voltage dips sharply and the phone cuts out before the OS can log a low-battery event. One full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the coulomb counter and eliminates most cliff shutdowns.

Phone reports wrong battery percentage after replacement

The fuel gauge IC on the OT-5038 was calibrated to the original cell's internal resistance and voltage curve. A new cell has different impedance characteristics, so the gauge's state-of-charge estimate drifts — often reading high early in discharge and then dropping steeply. The fix is one full manual cycle: drain the phone until it shuts off automatically, then charge uninterrupted to 100% with the screen off. After that cycle, percentage reporting stabilises to within a few points of actual charge state.