To determine why laptop battery may not be staying charged:
- Check your charging cable to ensure it is securely connected correctly to the laptop.
- Check to make sure the laptop is actually charging while connected.
- If the laptop is not charging, try a different charging cable, or test the existing cable on a different device—to see if the issue is with the cable or the laptop.
- If still nothing, use a voltmeter to check whether the laptop is receiving the correct power, or take the laptop into a repair shop for professional assistance.