Wiko F200 Replacement Battery B2860 3.7V 1100mAh

Wiko F200 — 3.7V Li-ion Replacement Battery (B2860)

This is a 3.7V, 1100mAh Li-ion replacement battery for the Wiko F200 smartphone. It uses OEM part number B2860 and matches the original cell's dimensions at 76.30 × 44.00 × 4.15mm. Fit this when the original cell no longer holds charge or fails to power the device through normal use.

• F200 platform fit: The F200 uses a fixed connector layout and BMS communication line matched to the B2860 cell specification. Voltage rails, protection circuit pinout, and physical footprint are verified against the original cell before shipping.
• Bench tested on actual hardware: We cycled this cell through charge and discharge under modem-active load conditions. The BMS held voltage above the 3.0V cutoff threshold under sustained screen-on and call simulation without triggering a protection trip.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its discharge curve against the new cell before high-current charging begins on an uncalibrated reference.

Why the F200 reports wrong battery percentage after a cell swap

The F200's fuel gauge IC stores a learned discharge curve from the old cell. When a new cell goes in, the IC keeps reading against that old curve, so percentage figures are inaccurate until it relearns. This shows up as the phone sitting at 100% for an unusually long time, then dropping fast toward the end. One full discharge to auto-shutdown followed by a full uninterrupted charge forces the coulomb counter to write a new reference curve. After that cycle, percentage reporting stabilises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display draws a current spike the cell cannot sustain without the voltage collapsing below the BMS cutoff threshold — even though the displayed percentage suggests charge remains. A freshly installed cell with an uncalibrated fuel gauge IC is most vulnerable to this on the first few cycles. The BMS reads a real voltage collapse, not a gauge error, and cuts output to protect the cell. Run one full discharge-to-shutdown and full recharge cycle — the gauge IC recalibrates and the cutoff trips accurately from that point.