This is my 3rd in as many years. although I'm hard on them they work well for me.
I have used the Plantronics voyager, Jabra wave and many other top brand bluetooth devices, and none of them have an all day battery life like this one. 24 hours means 24 hours!
2 batteries were in the box, they last very long!
This is the best bluetooth I've ever had and the sound is WONDERFUL love it....
I use this bluetooth everyday riding my bike to and from work, as well as during the day, and I really have not had one issue. The battery life is consistently good, as is the clarity. Overall I would give this bluetooth 6/5 if I could. Really impressive product.