Power management unable to detect battery

4.5

The OS shows "No battery detected" even though a battery is physically present.

Symptoms
  • "X" on battery icon
  • PC dies instantly when unplugged
  • Battery status "Unknown"
Possible Causes
  • Loose internal connector
  • Dead battery controller
  • Driver glitch

Step-by-Step Fix

1

Reinstall Battery Driver

Device Manager > Batteries > Uninstall "Microsoft ACPI-Compliant Control Method Battery" and restart.

2

Perform a Power Reset

Shut down, unplug, hold power button for 30 seconds, then restart.

3

Reseat the Battery

If comfortable, open the laptop and ensure the battery cable is firmly plugged in.

When to See a Technician

If the battery is old, the internal protection circuit may have tripped permanently.

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