Laptop battery not holding charge

4.5

The battery percentage drops from 100% to 0% in a very short time.

Symptoms
  • Short runtime
  • Inaccurate percentage
  • Shutdown at 20%
Possible Causes
  • Worn out cells
  • Calibration issue
  • High power draw

Step-by-Step Fix

1

Calibrate Battery

Charge to 100%, discharge to 5%, then charge to 100% again.

2

Check Wear Level

Use software like HWInfo to see the battery wear percentage.

3

Reduce Load

Lower brightness and disable unnecessary hardware (Bluetooth/Backlit keys).

When to See a Technician

A wear level above 40% usually justifies a battery replacement.

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