Laptop power & battery

Laptop battery not detected or shows 0% with charger plugged in

This usually means the system can't communicate with the battery, either from a loose connection, a driver issue, or a battery that's failed outright.

Difficulty
Easy
Time
15–30 minutes
DIY cost
$0–$100
Pro cost
$80–$180

Symptoms

  • Battery icon shows 'no battery detected'
  • Battery percentage reads 0% even while charging
  • Laptop only runs while plugged in
  • Battery status missing entirely from settings

Likely causes

  • CommonBattery driver not loaded or corruptedWindows sometimes loses track of the battery after an update.
  • CommonLoose internal battery connectorCommon after a drop, or on laptops with a removable battery that isn't seated well.
  • PossibleBattery has failed completely and needs replacementBatteries can die outright after years of use or deep discharge.
  • PossibleBIOS/firmware not recognizing the batteryA BIOS update can sometimes resolve detection issues.
  • Less commonBattery is swollen and has disconnected itself for safetyCheck for physical swelling before assuming it's just a software issue.

What to do

  1. Check the bottom of the laptop and under the keyboard for any visible swelling before doing anything else.
  2. In Device Manager (Windows), uninstall the 'Microsoft ACPI-Compliant Control Method Battery' driver and restart to force it to reload.
  3. If the battery is removable, power off, remove it, wait 30 seconds, and reseat it firmly.
  4. Check for a pending BIOS/firmware update from the manufacturer's support site.
  5. Try booting with only the charger connected (no battery, if removable) to confirm the laptop otherwise runs fine.
  6. If none of this restores detection, the battery itself has likely failed and needs replacement.

Tools and parts

  • None required
Replacement laptop batterySearch: “[laptop model] replacement internal battery”

When to call a pro

If you find any swelling, stop and treat it as a battery safety issue rather than a simple detection problem; otherwise a repair shop can confirm and replace a dead battery.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.