How do I know that my AirPods are charged?
How do I know if my AirPods are charged? They've been plugged in for over 24 hours and the little light on the inside of the case is still blinking.
Charge your AirPods and learn about battery life - Apple Support
That depends on the color of the blinking light; white, or amber…
When you connect your MagSafe Charging Case or Wireless Charging Case to a charger, or place it on a Qi-certified charging mat, the status light will stay on for 8 seconds. If the light flashes white, your AirPods are ready to set up with one of your devices. If the light flashes amber, you might need to set up your AirPods again.