To fully exhaust the e-liquid tank, the Box Plus should be recharged twice, plus one full charge when it comes out of the factory. 

1) Clouds and aroma will gradually decrease
2) When the battery is completely empty, the LED light will flash 3 times and turn OFF.

It takes 1-2 hours depending on the Type – C charger. When the Box Plus is fully charged, the LED light will turn OFF.

When the e-liquid tank has been fully exhausted, instead of the usual flavor-filled puffs, you will start to notice a burnt smell. This is an indication that the e-liquid tank is empty and it’s time to open another Box Plus.