Telstra F952 Compatible Battery Li3713T42P3h444865 3.7V 1300mAh

Telstra F952 / V880 — 3.7V Li-ion Replacement Battery (Li3713T42P3h444865)

This 3.7V, 1300mAh Li-ion cell replaces the original battery in the Telstra F952, F950, V880, and N73 smartphones. It matches the OEM part numbers Li3713T42P3h444865 and Li3712T42P3h444865. Physical dimensions are 43.50 × 47.00 × 6.10mm — confirm these against your existing cell before fitting.

• F952 / V880 platform compatibility: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol, which is why both OEM part numbers cross-reference to the same physical cell.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the F952 platform. The BMS accepted the cell without fault codes, and protection circuitry tripped correctly at low-voltage cutoff.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one full discharge down to automatic shutdown, then charge uninterrupted to 100%. This lets the fuel gauge IC map the new cell's discharge curve before it begins tracking capacity under normal load.

Why the F952 reports wrong battery percentage after a cell swap

The F952 uses a fuel gauge IC that builds its capacity model from the previous cell's coulomb-counting history. When a new cell goes in, that stored model no longer matches the actual discharge curve of the replacement cell. The gauge reads voltage and maps it against the old curve, so reported percentage drifts from real state-of-charge. One complete discharge-to-shutdown followed by a full uninterrupted charge cycle forces the IC to rebuild its model against the new cell.

Sudden shutdown at 20–25% on the replacement cell

This happens when the cell voltage drops sharply under load — typically during a call, screen-on navigation, or background sync — even though the gauge still shows charge remaining. The cell hits the BMS low-voltage cutoff faster than the gauge predicts because the fuel gauge IC hasn't recalibrated yet. It is not a faulty cell. Run two full discharge-charge cycles without fast charging enabled, then recheck. If shutdowns persist past cycle two, measure resting cell voltage with a multimeter — a healthy cell at 25% reported charge should read above 3.6V at rest.