Wiko Cink Five Replacement Battery 3.7V 2000mAh

Wiko Cink Five — 3.7V Li-ion Replacement Battery (STAIRWAY)

This is a 3.7V, 2000mAh Li-ion replacement cell for the Wiko Cink Five, Stairway, Darknight, and N300 smartphones. It slots in where the original STAIRWAY battery sits and restores the phone to full working capacity. Use the capacity figure from this listing — 2000mAh — not third-party sources, which vary.

• Cink Five / Stairway / Darknight / N300 compatibility: These models share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol, which is why one cell covers all four devices without modification.
• Bench tested on actual hardware: We ran this cell through a full charge cycle on the Cink Five platform. The BMS accepted the charge handshake cleanly, with no overcharge flag or protection cutoff triggered during the test cycle.
• Fuel gauge recalibration on first use: After installing this cell, disable fast charging and run one complete discharge-to-charge cycle before normal use. This gives the fuel gauge IC time to map the new cell's discharge curve accurately before high-current charging pushes current into an uncalibrated state.

Why the Cink Five reports wrong battery percentage after a cell swap

The Cink Five uses a coulomb counter in the fuel gauge IC that was calibrated against the original cell's discharge curve. When you install a new cell, that learned curve no longer matches the actual cell chemistry, so the percentage readout drifts. The IC needs at least one full discharge from 100% down to automatic shutdown, followed by a full charge, before it resets its reference points. Until that cycle completes, readings between 20% and 40% are the least reliable — the IC tends to over-report in that range.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff issue, not a capacity fault. Under screen-on load or active data use, the cell voltage drops faster than the fuel gauge IC anticipates, hitting the low-voltage cutoff while the display still shows charge remaining. It happens most often in the first few cycles before the fuel gauge has recalibrated. Run the phone through two full discharge-charge cycles and the shutdowns typically stop. If they persist past cycle three, check the cell resting voltage with the phone off — it should read above 3.6V within five minutes of removing the charger.