Hi there, thank you very much for your question! The SRS-XB100 comes with a rechargeable built-in lithium-ion battery for up to 16 hours of music playback. Music is the soundtrack to our lives, and we want you to be able to enjoy your tunes wherever you are. So, we’ve packed powerful, clear sound into a portable body. If you love good music and listening with friends, the XB100 is your perfect partner.
I hope this helps!
Best regards,
Romeo