TLi019DA Alcatel OT-5005R Replacement Battery 3.85V 1850mAh

Alcatel OT-5005R / OT-5033 Series — 3.85V Li-ion Replacement Battery (TLi019DA)

The TLi019DA is a 3.85V, 1850mAh (7.12Wh) Li-ion cell that fits the Alcatel OT-5005R and OT-5033 series smartphones. It slots into phones that have lost capacity due to cell aging or physical swelling. Voltage and connector match the original spec exactly.

• OT-5005R and OT-5033 platform fit: The OT-5005R, OT-5033A, OT-5033D, and OT-5033J all share the same 3.85V voltage rail, physical footprint (87.50 × 35.00 × 4.50mm), and connector pinout — which is why one cell covers the full range. The BMS handshake protocol is identical across these variants.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OT-5033 platform. The BMS accepted the cell without triggering an over-voltage fault, and the fuel gauge IC began tracking state-of-charge correctly after one full cycle.
• Fuel gauge recalibration on first install: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell. Skip this step and the OS percentage readout will drift.

Sudden shutdown at 20–30% on the OT-5005R after cell replacement

This happens because the fuel gauge IC is still running the discharge curve from the old, degraded cell. When the modem fires a transmission burst or the screen brightness spikes, the new cell's actual voltage drops briefly below what the OS expects at that state-of-charge. The phone reads this as a critically low voltage event and shuts down as a protection measure. One full discharge-charge cycle — no fast charging — gives the coulomb counter enough data to remap the curve to the new cell. After that cycle, shutdowns at 20–30% should stop.

Phone warm near the battery during the first charge after installation

A fresh cell arrives with higher internal impedance than a broken-in one. The charge IC pushes current into this higher-resistance cell, and some energy converts to heat rather than stored charge. This is normal for the first one or two cycles and not a fault condition. If the phone becomes hot enough to be uncomfortable to hold — above roughly 45°C — disconnect the charger, let it cool to room temperature, then resume charging at a lower current by using a standard 5W charger rather than a fast charger.