If you play music at a moderate volume level, the battery in your Beoplay Portal can support up to 24 hours with active Bluetooth and Active Noise Cancellation (ANC). And up to 12 hours with Xbox Wireless, Bluetooth and ANC. If using Bluetooth only, battery life increases to 32 hours – allowing for many hours of uninterrupted wireless connectivity.
In general, the battery life depends on volume, music intensity, and equalizer settings. This means that the battery drains faster at a higher volume when playing higher intensity music like rock or heavy metal.