WayteQ Libra X880 3.7V 1300mAh Replacement Battery

WayteQ Libra X880 — 3.7V Li-ion 1300mAh Replacement Battery

This is a 3.7V Li-ion cell rated at 1300mAh (4.81Wh), built to replace the original battery in the WayteQ Libra X880 smartphone. It fits the X880 form factor at 43.50 × 47.00 × 6.10mm. When the original cell degrades, calls drop, the screen dims under load, and the phone shuts down unpredictably — this cell restores normal operation.

• Libra X880 fitment: The X880 uses a compact removable cell at 3.7V nominal. This replacement matches that voltage rail and physical envelope exactly, so the charge IC and connector seat without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge sequences and monitored BMS cutoff behavior. The protection circuit responded correctly to over-discharge and over-current events at the expected thresholds.
• Fuel gauge recalibration on first cycle: On first use after installation, run the phone down to auto-shutoff before recharging fully. The fuel gauge IC on the X880 calibrates its coulomb counter against the real discharge curve of the new cell — skipping this step causes the percentage readout to drift or jump erratically for several days.

Sudden shutdown at 20–30% on the Libra X880

This is a voltage cliff problem, not a capacity problem. When the modem transmits or the screen backlights at full brightness, instantaneous current draw spikes sharply. An aged or uncalibrated cell cannot hold its voltage above the BMS cutoff threshold under that load, even if the fuel gauge still reads 25%. The BMS reads the voltage drop, not the percentage, and cuts power to protect the cell. After one full discharge-to-shutoff and full recharge cycle, the fuel gauge IC recalibrates and the shutdowns typically stop. If they continue, check that the cell resting voltage reads at least 3.6V after a full charge.

Phone will not power on after the battery sat in storage

Li-ion cells self-discharge in storage. If the Libra X880 sat unused for several months, the cell voltage may have dropped below 2.5V — the threshold where the BMS locks out to prevent cell damage. The phone will show nothing when you press the power button, and a standard charger may not trigger a charge cycle because the BMS blocks current input at that voltage. Connect the phone to a wall charger and leave it undisturbed for 15–20 minutes. Most charge ICs include a trickle pre-charge mode that slowly raises the cell to 3.0V before switching to normal CC-CV charging, at which point the screen should respond.