On rare occasions the speaker can show up with "all lights on".

In this event, we recommend to unplug the power adapter from the speaker and to complete a full discharge of the built-in battery. 

Speed up the discharge process by connecting an iPhone, iPad or iPod Touch to the speaker via an iOS USB charge cable. 

Once the battery discharge is completed (all lights switched off), plug back in the power adaptor and press the logo button to power on the speaker.