They have a really long battery life and he has never run out of charge yet. Very useful product. And no, it was not even close to being the correct one, I am so tired of wasting hard earned money for BS and lies. And they take up very little room and cost is reasonable. 😢 I have one foot and ankle that swells due to a 30 yr old injury. Gave them to my sister andordered the large. Due to some of the reviewers, I actually bought a half size above and I shouldve got my normal size. Parma loves his bed so so so much! Sennheisser 600 series on up) which would tie me to an amplifier .