K2 - User guide - Battery levels and management

K2 has one built-in battery in the headphones.

Charging and play times

The headphones can be used for approximately 60 hours on one charge (27 hours with the ANC on).

The battery takes approximately 90 minutes to fully charge. K2 does not support quick charge.

Charging methods

K2 can be charged with a USB-C cable included in the packaging. 

We recommend using the Sudio cable included in the package, however, other third-party USB-C cables may be compatible too.

Battery level indicators

Headphones (no cable inserted)

When the battery level is extremely low (0-10%), the LED light indicator on the headphones will start flashing orange.

Battery life status will be indicated on your smartphone for iOS and most Android devices. Since phone manufacturers have various Android devices that work differently, you can also download various battery apps on the Google Play Store.

Headphones (with cable inserted and charging)

  • Amber light - 0-99% battery charged
  • White fixed light - 100% battery charged
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