Wiko Wim Lite TLP17G18 Replacement Battery 3.8V 2900mAh

Wiko Wim Lite — 3.8V Li-Polymer Replacement Battery (TLP17G18)

This 3.8V, 2900mAh Li-Polymer cell is a direct swap for the battery in the Wiko Wim Lite (P6901). The TLP17G18 matches the original connector, physical footprint (73.00 × 53.40 × 4.40mm), and BMS handshake expected by the device's charge IC. Capacity is drawn from product data — 11.02Wh total.

• Wim Lite / P6901 platform fit: Both model references share the same PCB layout, connector pinout, and charge controller. The TLP17G18 cell communicates with the same fuel gauge IC across both variants, so no firmware or hardware difference changes the swap procedure.
• Bench tested on actual hardware: We ran the cell through charge, full discharge, and charge again on the Wim Lite platform. The BMS accepted the charge handshake on the first cycle, and the charge IC did not flag an incompatible cell or trigger a hard cutoff.
• First-cycle fast charge lockout: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still running the discharge model it built against the old, degraded cell. A fresh cell has a steeper voltage cliff at low state-of-charge than the worn cell did. The phone's charge controller sees voltage drop suddenly under modem or screen load and cuts power before the displayed percentage reaches zero. One full discharge-charge cycle lets the coulomb counter rebuild its model against the new cell curve, and the premature shutdowns stop.

Percentage jumping erratically after replacement

The fuel gauge IC stores a learned capacity model tied to the old cell's internal resistance profile. After swapping cells, that stored model no longer matches actual cell behaviour, so reported percentage can jump 10–15 points in either direction. This is not a fault in the replacement cell — it is the IC recalibrating. Drain the phone to automatic shutdown, charge uninterrupted to 100%, and the gauge will reset its reference points to the correct 3.8V cell curve.