Sony Xperia XZ3 Replacement Battery LIP1660ERPC 3200mAh

Sony Xperia XZ3 — 3.85V Li-Polymer Replacement Battery (LIP1660ERPC)

This 3.85V, 3200mAh (12.32Wh) Li-Polymer cell replaces the original LIP1660ERPC battery in the Sony Xperia XZ3, H9436, 801SO, and SO-01L. It fits the same physical footprint at 78.45 × 49.34 × 5.00mm and connects to the same flex-ribbon BMS harness. Capacity figures come from the product data — not interpolated from a generic spec sheet.

• XZ3 platform compatibility: The H9436, 801SO, and SO-01L are regional variants of the same XZ3 hardware platform. They share the same battery bay dimensions, the same 3.85V nominal rail, and the same BMS connector pinout — so one cell covers all variants without modification.
• Bench tested on actual hardware: We ran this cell in an XZ3 and confirmed the BMS handshake on both Qnovo adaptive charging and standard USB-PD input. The charge IC accepted the cell on the first connection, and the fuel gauge IC began tracking without a forced reset.
• First-cycle calibration on the XZ3: On first use after installation, disable fast charging for one complete discharge-charge cycle. The XZ3's fuel gauge IC was calibrated against the discharge curve of the original cell. Feeding high current into an uncalibrated replacement cell before the IC has mapped the new curve can cause the percentage readout to drift by 10–15 points.

Sudden shutdown at 20–30% on the Xperia XZ3 after a cell swap

This is a voltage cliff problem, not a capacity problem. When the modem transmits or the OLED panel hits peak brightness, instantaneous current draw spikes sharply. A new cell that has not been through a full calibration cycle may drop below the BMS cutoff threshold — around 3.0V under load — even though the fuel gauge IC still reports 20–30% remaining. The BMS cuts the cell to protect it, and the phone shuts off. One full slow-charge cycle lets the coulomb counter re-anchor its zero point, which closes the gap between reported and actual cell voltage.

USB-PD fast charge not working on the first cycle after replacement

The XZ3's charge IC uses a handshake sequence to negotiate USB-PD voltage before enabling high-current charging. On a replacement cell, the BMS may not pass that handshake cleanly on the first plug-in — particularly if the cell voltage is low from storage. The phone defaults to standard 5V charging as a fallback. Plug into a Qualcomm Quick Charge or Sony-certified USB-C adapter, allow a 15-minute standard-rate charge to bring the cell above 3.6V, then unplug and reconnect — the fast-charge negotiation typically succeeds on the second connection at that state of charge.