Motorola Moto Z TD-LTE Replacement Battery SNN5972A 3.8V

Motorola Moto Z XT1650 Series — 3.8V Li-Polymer Replacement Battery (SNN5972A)

This 3.8V, 2300mAh (8.74Wh) lithium-polymer cell replaces the factory GV30 battery in the Moto Z TD-LTE and Moto Z Dual SIM smartphones. It fits XT1650-03 and XT1650-05 variants and slots into the same footprint as the original at 75.83 × 65.45 × 3.80mm. Voltage and connector pinout match OEM spec — no modifications needed.

• XT1650 platform compatibility: The XT1650-03 and XT1650-05 share the same battery bay dimensions, BMS handshake protocol, and 3.8V nominal voltage rail. One cell covers both variants without any electrical compromise.
• Bench tested on actual hardware: We cycled this cell in an XT1650-03 unit and confirmed the BMS accepted the cell, completed charge termination cleanly at 4.35V, and held voltage above 3.6V through a full processor and modem load sequence.
• Fuel gauge recalibration on first use: After installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before Motorola's TurboPower protocol pushes high current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Moto Z after a cell swap

The XT1650 fuel gauge IC stores a learned discharge curve from the old cell. When a new cell goes in, the IC applies the old curve to the new cell's chemistry — and misjudges the voltage cliff. The phone reads 25% but the cell has already dropped below the modem's minimum sustain voltage under load, triggering an emergency shutdown. One complete discharge cycle — draining to auto-shutdown, then charging uninterrupted to 100% — forces the coulomb counter to reset against the new cell's actual capacity. After that cycle, percentage readings stabilise and premature shutdowns stop.

TurboPower fast charge not activating after replacement

Motorola's TurboPower protocol requires the charge IC to confirm cell impedance is within an acceptable range before switching from 5W to high-current mode. A brand-new cell has higher internal impedance than a broken-in cell, so the charge IC defaults to standard 5W on the first cycle. This is not a fault — it is a protective handshake. Run one full standard charge cycle and TurboPower will engage normally on subsequent charges once the cell's impedance settles below the IC's threshold, typically around 100–150mΩ.