ZTE Nubia Z17 Li3932T44P6h806139 Replacement Battery 3.85V

ZTE Nubia Z17 — 3.85V Li-Polymer Replacement Battery (Li3932T44P6h806139)

This 3.85V, 3100mAh Li-Polymer battery replaces the original cell in the ZTE Nubia Z17 and Nubia Z17 Dual SIM (NX563J). It matches the OEM part number Li3932T44P6h806139 and fits the stock battery bay without modification. Voltage and physical dimensions — 79.52 x 60.65 x 3.66mm — match the original specification exactly.

• Nubia Z17 and NX563J platform fit: The Z17 series — including standard and Dual SIM TD-LTE variants — shares the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers all listed models without adapter or modification.
• Bench tested on actual hardware: We cycled this cell through a full discharge-charge sequence on a Z17 unit and confirmed the BMS accepted the cell, charge current ramped correctly through CC/CV stages, and no fault codes triggered in the charge IC log.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the coulomb counter begins tracking state-of-charge under load.

Sudden shutdown at 20–30% on a fresh Z17 cell

A new cell does not share the discharge curve the fuel gauge IC learned from the old battery. When the phone hits a voltage point the coulomb counter associates with a low charge state, it triggers a protective shutdown — even if actual capacity remains. The modem and display together pull enough current to cause a voltage sag that looks like a cliff to the fuel gauge. One full discharge to zero followed by an uninterrupted charge to 100% resets the calibration and typically resolves the early shutdowns.

USB fast charge not activating after battery replacement

The Nubia Z17 uses a proprietary fast-charge handshake between the charge IC and the battery BMS. On the first cycle after a cell swap, the charge IC may default to standard 5V input while it negotiates with the new BMS. This is not a fault — it clears after the first full charge cycle completes. If fast charge still does not activate after two full cycles, check that the charge port contacts are clean and reseat the battery connector to confirm pin contact at all four terminals.