Wiko Lubi 2 Replacement Battery 3.7V 1200mAh Li-ion

Wiko Lubi 2 — 3.7V Li-ion Replacement Battery (Lubi2)

This is a 3.7V Li-ion cell rated at 1200mAh (4.44Wh) for the Wiko Lubi 2 smartphone. It covers the Lubi 2, Lubi2, Lubi, and Riff models that share the same form factor and connector. Dimensions are 53.00 x 34.00 x 5.70mm — confirm these against the original cell before ordering.

• Lubi and Riff platform fit: The Lubi 2, Lubi, and Riff share the same battery bay dimensions and connector pinout. The BMS communicates charge state over the same two-wire interface, so this cell slots into all four compatible models without adapter or modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Wiko platform and monitored BMS handshake, cutoff voltage, and charge acceptance. The cell reached full capacity by the second cycle with no charge IC faults reported.
• Fuel gauge recalibration on first install: After fitting this cell, disable fast charging for one full discharge-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins. Skipping this step causes the OS to misread state-of-charge against the old cell's curve.

Sudden shutdown at 20–30% on the Wiko Lubi 2

This happens when the cell cannot hold voltage under load from the modem or display. The fuel gauge IC reads a healthy percentage at rest, but the moment current draw spikes — an incoming call, screen wake — voltage drops below the BMS cutoff threshold and the phone shuts off. It is not a fault with the replacement cell itself. One full discharge-charge cycle recalibrates the coulomb counter so the OS cuts off before the voltage cliff, not after.

Phone not powering on after the battery sat in storage

Li-ion cells self-discharge during storage. If the cell drops below 2.5V, the BMS enters lockout mode and blocks charge input to protect the cell from damage. Plug into a charger and leave it connected for 15–20 minutes without pressing the power button — the charge IC needs time to trickle current past the BMS lockout threshold. Once the cell climbs above 3.0V the BMS releases and normal charging resumes.