Alcatel One Touch Pop D5 TLi018D1 Replacement Battery 3.8V 1800mAh

Alcatel One Touch Pop D5 — 3.8V Li-ion Replacement Battery (TLi018D1)

This is a 3.8V, 1800mAh Li-ion battery for the Alcatel One Touch Pop D5 and its OT-5038 variants (OT-5038A, OT-5038E). It replaces OEM part numbers TLi018D1 and TLi018D2. If your original cell no longer holds charge through a full day of calls and messaging, this is the direct swap.

• OT-5038 series fit: The OT-5038, OT-5038A, and OT-5038E share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all three accept the TLi018D1 cell without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on OT-5038 hardware. The BMS accepted the cell without fault codes, and charge termination triggered correctly at 4.35V.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins on an uncalibrated counter.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC still holds the old cell's discharge curve in memory. The phone calculates remaining capacity against a worn curve, so it reads 20–30% while the actual cell voltage has already dropped below what the modem and screen draw can sustain. The result is an abrupt shutdown — not a gradual drain. One full discharge-charge cycle at standard rate forces the coulomb counter to reset against the new cell's actual voltage floor, typically around 3.4–3.5V under load.

Phone warm near the battery during the first few charges

A new cell has higher internal impedance than a broken-in cell. During the first two or three charge cycles, the charge IC pushes current into that higher impedance, and the extra resistance converts some of that energy to heat. This is normal and not a fault. Warmth should decrease noticeably by the third full cycle. If the back of the phone stays hot past cycle four, check that the charge IC is not stuck in fast-charge mode on an uncalibrated cell — drop to standard 5V/1A charging until the fuel gauge stabilises.