The SOUNDBOKS 2 uses a custom 12.8 V LiFePO4 battery. The battery is charged using a charger that converts the voltage of your wall socket (110 V - 230 V) into 14.6 V in order to charge it.
The automatic BOOST feature in the SOUNDBOKS 2 will enable 24 V operation in order to achieve higher volume with minimum distortion. As the name of the feature suggests, the boosted 24 V supply will be automatically enabled by intelligently sensing the music level. If the music level is above a threshold level, an integrated 12.8-to-24 V DC-DC converter powers up and supplies the power when it is needed. Everything happens automatically, which ensures that power losses are kept to the absolute minimum - you do not need to worry about anything else than choosing the volume you want.