1 point@iHM24 Rondo 2 has a built in rechargeable battery. People are reporting very long battery life. Some people have reported 20-21 hours. There is an optional remote battery pack but that is corded to the Rondo 2. The Rondo 2 can also be powered up for less than a full 4 hour charge cycle if needed. I am interested in the battery life of Rondo 2 also over time.