TLP035AJ Alcatel N1 Max Replacement Battery 3.8V 3500mAh

Alcatel N1 Max / OT-7070X — 3.8V Li-Polymer Replacement Battery (TLP035AJ)

The TLP035AJ is a 3.8V, 3500mAh (13.3Wh) lithium-polymer cell for the Alcatel N1 Max, Pop 4 6", OT-7070X, and 7070X smartphones. It replaces the original factory cell when capacity has degraded or the battery is physically damaged. The connector, BMS handshake, and footprint match the OEM spec for these models.

• N1 Max / Pop 4 6" / OT-7070X platform fit: These four models share the same battery bay geometry, 3.8V nominal rail, and flex connector position. The TLP035AJ BMS communicates with the charge IC on all four without modification or adapter.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OT-7070X platform. The BMS accepted charge handshake immediately, and the charge IC held the correct 4.35V upper cutoff throughout the test cycle.
• 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 the charge IC begins pushing higher current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Alcatel N1 Max after a cell swap

The N1 Max fuel gauge IC retains the discharge curve from the old cell after replacement. When the phone hits a load spike — modem transmission, screen-on burst — the new cell may drop below the 3.2V cutoff threshold faster than the fuel gauge predicts. The phone reads 25% but the cell voltage has already collapsed under load. One full discharge-charge cycle at standard rate resets the coulomb counter and eliminates these early shutoffs.

USB fast charge not activating on the first cycle after replacement

After a cell swap, the charge IC on the OT-7070X platform runs an initialisation check before accepting a fast-charge protocol handshake. If the fuel gauge IC reports an uncalibrated state, the charge IC defaults to standard 5V/1A input and ignores the fast-charge trigger. This is normal behaviour, not a fault with the replacement cell. Complete one full charge cycle at standard rate — fast charging resumes automatically on the next plug-in once the IC clears the uncalibrated flag.