Schenker XMG P502 PRO Compatible Battery 14.8V 5200mAh

Schenker XMG P502 PRO / XIRIOS W701 Series — 14.8V Li-ion Replacement Battery

This 14.8V, 5200mAh (76.96Wh) Li-ion battery fits the Schenker XMG P502 PRO, XIRIOS W701, XMG P702 PRO, XIRIOS W702, and several additional models in the same platform family. It replaces a degraded or failed original cell and restores unplugged operation to the notebook. Voltage and connector match the original specification — no adapter or modification required.

• XMG P502 PRO / XIRIOS W7-series platform fit: These models share a common 14.8V battery bay, connector pinout, and BMS communication protocol. A single cell revision covers the full set — the charge controller handshake is identical across the listed variants, so the same EEPROM pairing applies.
• Bench tested on actual hardware: We cycled this cell through charge, load, and BMS trip conditions on the XMG platform. The protection circuit responded correctly to overcurrent draw during a CPU plus GPU stress run, and the fuel gauge IC reported accurate state-of-charge after two calibration cycles.
• Post-install calibration on the XMG P502 PRO: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap — skipping this step leaves the fuel gauge misreporting capacity.

BIOS reporting poor battery health immediately after fitting a new cell

The XMG P502 PRO BIOS reads EEPROM data written by the original cell during its first learn cycle. When a new cell is installed, that EEPROM record is either absent or mismatched, so the firmware flags health as poor or unknown before any calibration has occurred. This is a firmware state, not a fault with the replacement cell. Run one full discharge to hibernate threshold, then charge to 100% without interruption — after that cycle, the BIOS updates its stored record and the warning clears.

Laptop shuts down at 20–30% charge shown on new battery

This happens when the cell voltage drops below what the platform expects under full CPU and display load, even though the OS gauge still shows charge remaining. The fuel gauge IC has not yet mapped the new cell's voltage-to-capacity curve accurately. Under heavy load, the cell hits its cutoff voltage before the gauge reaches 0%, so the system shuts down abruptly. Complete two to three full discharge-and-charge cycles — once the IC recalibrates its curve, the shutdown threshold and the displayed percentage will align closer to 5–8% remaining.