If your earbuds drain one side faster than the other, try this.
When the faster draining one hits about half way, put it in the case and let the other pair to your device before taking it out again, this will change the "master" earbud and then drain the other side faster instead, which should even out and give you more overall battery life out of one charge. If you don't want to use the case, a simple power off\on cycle works too, as long as you allow the "slave" to pair as "master".
Das gefunden dazu
Tried this and it works perfectly on my Liberty 2
Pro!