ZTE Skate Li3714T42P3h853448 Replacement Battery 3.7V

ZTE Skate / G1315 — 3.7V Li-ion Replacement Battery (Li3714T42P3h853448)

This is a 3.7V, 1100mAh Li-ion cell built to the OEM spec for the ZTE Skate and G1315 series smartphones. It fits the original battery slot and connects to the same three-point contact pad used across the Skate, Skate G1315, G1315, and Tania variants. Swap it in when the original cell no longer holds a usable charge or fails to power the phone through normal use.

• Skate and Tania platform compatibility: The Skate, G1315, and Tania share the same battery bay dimensions — 84 × 34 × 4mm — and the same contact layout. One cell part number, Li3714T42P3h853448, covers all variants because the charge IC and BMS handshake protocol are identical across this platform.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Skate platform. The BMS accepted charge current without flagging an error, held voltage above 3.6V through the mid-discharge range, and cut off cleanly at the low-voltage threshold without triggering a forced shutdown loop.
• Fuel gauge recalibration on first use: After fitting this cell, run one full discharge to automatic power-off, then charge to 100% without interruption. The Skate's fuel gauge IC recalibrates its coulomb counter against the new cell's discharge curve during this first cycle. Skipping it causes the percentage reading to drift or jump for days.

Sudden shutdown at 20–30% on the ZTE Skate after a cell swap

A new Li-ion cell has a slightly different internal resistance profile than the aged cell the Skate's charge IC was calibrated against. Under peak load — mobile data, screen at full brightness, a call connecting — the cell's terminal voltage dips sharply. The Skate's BMS reads that dip as a low-voltage event and cuts power before the fuel gauge reaches zero. The fix is completing at least one full discharge-charge cycle so the fuel gauge IC maps the actual voltage cliff of the new cell. After calibration, the shutdowns stop and the percentage reported at cutoff aligns with the real remaining capacity.

Phone warm near the battery compartment during first charge

A fresh Li-ion cell comes from the factory with higher internal impedance than a cell that has been cycled a few times. During the first charge, the Skate's charge IC pushes current into a cell that hasn't yet settled into its low-impedance state, and that resistance converts some energy to heat. This is normal for the first one or two cycles and not a sign of a faulty cell. If warmth continues past the third full charge, check that the battery contact pads are seated flat — a misaligned contact increases resistance further and amplifies heating.