BL-F17 Replacement Battery for PHICOMM 2S 3.7V 2200mAh

PHICOMM 2S / X130 Series — 3.7V Li-ion Replacement Battery (BL-F17)

The BL-F17 is a 3.7V, 2200mAh Li-ion cell that fits the PHICOMM 2S, X130V, X130W, and X130wa smartphones. It restores power to handsets where the original cell has degraded and can no longer hold a usable charge. Dimensions are 72.00 × 58.50 × 4.55mm — confirm these against your original before fitting.

• X130 platform compatibility: The 2S, X130V, X130W, and X130wa all share the same battery bay dimensions, 3.7V single-cell architecture, and connector pinout, which is why one cell covers the full group. No adapter or rewiring needed.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a PHICOMM handset and confirmed the BMS accepted charge handshake without fault codes. Capacity measured within normal tolerance of the rated 2200mAh at standard draw.
• Fuel gauge recalibration tip: On first use after fitting, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging starts — skipping this step causes erratic percentage readings for days.

Sudden shutdown at 20–30% on a freshly fitted BL-F17

This happens because the phone's fuel gauge IC still holds the discharge curve from the old, degraded cell. The new cell hits a voltage cliff — a sharp voltage drop under modem or screen load — at a point the IC incorrectly reads as 20–30% remaining. The phone interprets that voltage sag as a safe-shutdown threshold and cuts out. One full discharge from 100% down to automatic shutoff, then a full uninterrupted charge, resets the coulomb counter and clears this behaviour.

Phone won't power on after the BL-F17 sat in storage

Li-ion cells self-discharge in storage. If the BL-F17 dropped below roughly 2.5V per cell, the BMS enters lockout mode to prevent damage — and a locked-out BMS looks identical to a dead battery. Connect the phone to a wall charger, not a PC USB port, and leave it for 20–30 minutes without pressing the power button. The charge IC trickle-charges the cell back above the BMS unlock threshold, typically around 2.9V, at which point the BMS re-initialises and the phone will boot normally.