Alcatel TLi004FA OneTouch 1035D Replacement Battery 3.7V 400mAh

Alcatel OneTouch 1035D — 3.7V Li-ion Replacement Battery (TLi004FA)

This is a 3.7V, 400mAh Li-ion replacement battery for the Alcatel OneTouch 1035D. It also fits the OneTouch 1046D, OneTouch 1013X, and OT-1035D. The TLi004FA cell slots directly into any of these models and restores calling and messaging functionality when the original cell has degraded.

• OneTouch 1035D, 1046D, 1013X platform: These models share the same 3.7V battery bay, connector pin-out, and BMS handshake protocol — one cell works across the whole group without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a 1035D unit. The BMS accepted the cell without fault flags, charge current stepped correctly at the taper phase, and cutoff triggered cleanly at the low-voltage threshold.
• Fuel gauge recalibration on first install: After fitting this cell, run one full discharge down to automatic power-off, then charge uninterrupted to 100% before use. The 1035D fuel gauge IC is calibrated to the old cell's discharge curve — skipping this step causes the percentage counter to misread the new cell from the start.

Sudden shutdown at 20–30% on the OneTouch 1035D after a cell swap

The 1035D's fuel gauge IC stores a learned discharge curve from the old cell. When a new cell goes in, the IC still references those old end-of-discharge voltage points. The new cell's internal resistance profile differs, so under the load of an active call or backlight, terminal voltage drops faster than the IC predicts — triggering a hard shutdown well before the gauge reads zero. Running one complete discharge-to-cutoff cycle lets the coulomb counter reset its reference points against the actual new cell behavior. After that cycle, shutdowns at 20–30% typically stop.

Phone warm near the battery during the first charge after replacement

A brand-new Li-ion cell starts with higher internal impedance than a broken-in one. The 1035D's charge IC pushes constant current into that higher-impedance cell, and the extra resistive heating is normal for the first one or two cycles. If the phone feels uncomfortably hot to touch or the charger disconnects before reaching 100%, check that you are using the original Alcatel 5V/1A charger — third-party chargers that exceed 1A can overdrive the small 400mAh cell. Heat should reduce noticeably after the second full charge cycle.