ZTE Axon 30 Li-Polymer Replacement Battery 3.87V 4100mAh

ZTE Axon 30 / A2322 — 3.87V Li-Polymer Replacement Battery (Li3941T44PGh836548)

This is a 3.87V, 4100mAh Li-Polymer cell for the ZTE Axon 30 (model A2322). It replaces the original Li3941T44PGh836548 battery when the existing cell has degraded through repeated charge cycles. Fits the Axon 30 directly — same voltage rail, same form factor at 82.30 × 64.00 × 4.40mm.

• Axon 30 and A2322 compatibility: Both the Axon 30 and A2322 designations refer to the same hardware platform. They share an identical battery bay geometry, connector pinout, and BMS communication protocol — one cell covers both.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Axon 30 platform. The BMS handshake completed cleanly, charge current stepped correctly through CC and CV phases, and the protection circuit tripped at the expected over-voltage threshold.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes significant current into an uncalibrated cell — prevents erratic percentage readings from the first day.

Why the Axon 30 reports wrong battery percentage after a cell swap

The Axon 30 uses a coulomb counter IC that builds its capacity model from the cell it learned on. When you swap to a new cell, the IC still references the old degraded curve, so reported percentage drifts from actual charge state. The fix is one full uninterrupted discharge to around 3% and a slow charge back to 100% with fast charging disabled. After that cycle the IC recalibrates its full-charge capacity register against the new cell. Subsequent readings will track correctly.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC hasn't finished recalibrating and the cell voltage drops sharply under modem or display load — the protection circuit sees the voltage cliff and cuts power before the reported percentage reaches zero. It is not a faulty cell. Run two full slow-charge cycles with the screen brightness reduced and mobile data active to stress the cell under realistic load. After calibration completes, the gauge will correctly predict the voltage drop and the phone will reach low single digits before shutting down. Confirm the cell rests above 3.87V open-circuit after a full charge.