Each time the headphones are powered on, the voice prompt announces the headphone battery charge level. To visually check the battery, the indicator is located on the inside right side of the neckband
When the headphones are in use, the battery icon blinks red when the battery needs charging
If the headphones are connected to an Apple device, the device displays the headphone battery charge level near the upper right corner of the screen and in the notification center (pulled down from lock screen)
