When both the charging case and earbuds are actively charging, the status LED will breathe red.

If the earbuds are fully charged and the charging case is fully charged afterwards, the status LED will turn solid green for 5 minutes before turning off.

If only the earbuds are charging, the status LED will breathe green.

If both the earbuds and charging case are fully charged, and the charging case did not finish charging within the past 5 minutes, the status LED will be completely off. 

Both the charging case and earbuds will individually charge from zero to full in roughly 1.5 to 2 hours.