Schenker XMG-A305-4UQ Replacement Battery 11.1V 5200mAh

Schenker XMG-A305 Series — 11.1V Li-ion Replacement Battery

This 11.1V, 5200mAh (57.72Wh) Li-ion battery fits the Schenker XMG-A305-4UQ and related XMG-A305 variants including the 5UR, 1ER, and 7UK. It restores portable operation to XMG gaming notebooks where the original cell has degraded or failed to hold charge. Voltage, connector pinout, and physical dimensions match the original battery bay.

• XMG-A305 platform compatibility: The A305 variants in this lineup share the same 11.1V three-cell architecture, battery bay dimensions (202.80 × 49.10 × 24.50mm), and connector layout. One cell fits the full model range because the BMS handshake uses the same communication protocol across the series.
• Bench tested on actual hardware: We ran charge-discharge cycles on this cell and monitored BMS response under simulated gaming load — CPU and GPU draw combined. The protection circuit held correct cutoff thresholds at both ends of the voltage range without false trips.
• Post-installation calibration on XMG notebooks: After fitting this cell, run the laptop down to hibernate cutoff on battery alone, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on XMG systems.

BIOS reporting poor battery health immediately after fitting a new cell

XMG notebooks store battery health data in EEPROM and compare it against the connected cell at every boot. A new cell has no accumulated cycle data, so the BIOS flags it as degraded until the learn cycle runs. This is a firmware read issue, not a fault with the replacement cell. Run one full discharge to hibernate, then charge straight to 100% without interruption — the health status corrects itself after that cycle completes.

Laptop shuts down at 20–30% charge shown on screen

Under full gaming load — CPU, GPU, and display all drawing simultaneously — the cell voltage drops faster than the fuel gauge IC can track. When voltage hits the BMS cutoff threshold, the system shuts off even though the OS still shows charge remaining. This is a voltage cliff caused by high-draw load on a cell that hasn't been calibrated to the system yet. Run two or three full discharge-to-hibernate cycles and the fuel gauge IC recalibrates its internal model to match actual cell behaviour.