The charging case has a 420mAh battery. Thanks to this, you can completely recharge the earphones up to 2.25 times. This means that your SPC Zion Air Pro can have full autonomy up to 16 hours of use, approximately.
Connect the USB cable to the USB charging port on the case. A full charge of the charging case requires 120 minutes. The case's LED lights let you know what level of charge is at any time. This light will stop blinking and will remain lit when the battery is fully charged.