Summary: Since these speakers are big and bulky, they would not make very good portable speakers. They do run on batteries, but they require more batteries than other portable speakers in this review. If you run out of batteries, there is an optional AC power adaptor available. These travel speakers can play an impressive range of sound, but they would take up too much space in your carry-on bag or backpack.
Pros: The Sony SRS-A27 speakers offer a broad range of sound.