Battery Report Summary – Surface Laptop 7 (Snapdragon X Elite)

Report Date: November 27, 2025

Device: Microsoft Surface Laptop 7, Snapdragon X Elite

Charge Cycles: 9

1. Key Data

• Battery Name: SurfaceBattery
• Manufacturer: SWD
• Design Capacity: 52,330 mWh
• Full Charge Capacity: 53,850 mWh
• Cycle Count: 9

2. Usage Observations

• Despite the battery being new (only 9 cycles), the report shows abnormally fast discharge.
• Examples from the report:
  • On November 25, the battery dropped from 30% (16,340 mWh) to 23% (12,520 mWh) in ~20 minutes of use.
  • On November 27, during “connected standby,” the battery fell from 77% (41,200 mWh) to 55% (29,440 mWh) within about one hour.
• These behaviors are inconsistent with expectations for a new device with full capacity.

. Technical Analysis

• Battery authenticity: The data indicates the battery is original (manufacturer SWD, capacity matches design).
• Primary issue: The discharge rate is unusually fast and unstable, which is not normal for a battery with so few cycles.
• Possible causes:
  • Defect in the Battery Management System (BMS).
  • Internal cell imbalance.
  • Firmware/driver issue affecting power management.

4. Conclusion and Request

The Surface Laptop 7 is showing abnormal battery behavior despite being new and original.

Any idea where this problem comes from? Any solution?

Thanks in advance!