Here are a few reasons why your vape pen might start blinking:
1. Low Battery: Many vape pens will blink simply to let you know that it is almost out of power and needs charging.
2. Improperly Installed Vape Pod: It is possible the vape device cannot detect the pod.
3. Insufficient e-liquid: Some vape pen models will blink if the level of e-liquid in the cartridge has become depleted.
4. Vibration Alerts: If you inhale 15 times in 15 minutes, the device will vibrate and flash to alert you.