Wiko Cink Peax Replacement Battery PEAK 2 3.7V 1750mAh

Wiko Cink Peax / Cink Peax 2 — 3.7V Li-ion Replacement Battery (PEAK 2)

This 3.7V 1750mAh Li-ion cell replaces the original PEAK 2 battery in the Wiko Cink Peax and Cink Peax 2 smartphones. It matches the OEM voltage rail, connector pinout, and physical footprint at 60.65 × 57.80 × 4.50mm. Swap it in when the original cell no longer holds usable charge or fails to power on.

• Cink Peax and Cink Peax 2 compatibility: Both handsets use the same PEAK 2 battery format — identical voltage rail, connector, and BMS communication lines. One cell covers both models without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Cink Peax platform. The BMS accepted the cell without fault codes, and the charge IC completed a full constant-current to constant-voltage transition at 4.2V.
• First-cycle fuel gauge reset: After installation, disable fast charging and run one complete discharge down to automatic shutdown, then charge to 100% uninterrupted. This lets the fuel gauge IC map the new cell's discharge curve before resuming normal use.

Sudden shutdown at 20–30% on the replacement cell

The Cink Peax fuel gauge IC retains the old cell's discharge curve in memory after a swap. When the modem or display draws a short current spike, the new cell's actual voltage drops faster than the stored curve predicts — the system sees what looks like a collapse and triggers an emergency cutoff. This is not a faulty cell. Run one full discharge-to-shutdown cycle without interruption and let the phone charge back to 100%. After that cycle the coulomb counter recalibrates and the premature shutdowns stop.

Phone reports wrong battery percentage after cell swap

The fuel gauge IC on the Cink Peax uses a stored charge table built from the original cell's impedance and capacity. A new cell has different internal resistance, so the IC's state-of-charge estimate drifts — you may see the percentage jump, stall at an odd number, or read 1% before shutting down. The fix is a full recalibration cycle: discharge the phone completely until it shuts itself off, then charge straight to 100% without unplugging. One complete cycle rewrites the reference table against the new cell and percentage reporting stabilises at 3.7V mid-charge.