If you play music at moderate volume levels, the battery in your Beoplay Eleven can support up to 6 hours of playtime with ANC on and 8 hours with ANC off. For the Beoplay Eleven, a fully charged case provides up to 2.5 extra earphone charges. This means that you will have up to 2.5 charges (including the first charge) and the equivalent of up to 20 hours (ANC on) / 28 hours (ANC off) of playtime when on-the-go.
The battery life depends on the volume, intensity of music and equalizer settings. This means that the battery drains faster at higher volume when playing higher intensity music like rock or heavy metal.
Charge the charging case every 14 days for optimal battery performance.
Make sure to keep your Bang & Olufsen product out of direct sunlight to prevent the battery from overheating, both when using and storing the product.
Make sure to charge the battery so that the battery level is not low a longer period of time (weeks/months). The preferred battery level before storage is about 60-70%.
Avoid charging your product too often. In general, rechargeable batteries perform best when kept between 20% and 80% battery charge.