Suunto Sonic User Guide

Battery and charging

The battery performance on a single charge depends on how you use your headphones and in what conditions. Low temperatures, for example, reduce the duration of a single charge. In general, the capacity of rechargeable batteries decreases over time.

The headphones are fully charged in one hour, and you can listen to up to 10 hours of music with one charge.

When the battery level is less than 5%, the headphones play a low battery alarm tone every 5 minutes, and the red LED light is blinking.

To check the battery status of your headphones, connect the product to Suunto app. You can see the battery status on the headphones' page in the app.

For charging your headphones, use the supplied USB cable.

USB cable

The USB charging cable is included in the product package. For charging the headphones with the cable, connect the magnetic end of the cable to the charging port of the headphones. If the headphones are switched on, they will automatically switch off when the charging starts. While the headphones are charging, the red LED light is on. When the battery is fully charged, the LED light turns white for a minute, then it turns off.