There is no way to tell the battery life. I, however, was hobbling along wishing I had brought real water shoes. The key hooks have an unnecessary bulge at the end of it that acts as an obstruction when you put key rings on and off. (I’m not going to yell at someone for wearing their shoes in my house. As you can see on the video i can open them with one hand and also nice little touch you can still see the LED lights. i also really like the braided cord since its pretty tangle-proof, and although it does generate a lot of noise when the earbuds are in theres a clothing clip provided. Totally recommend this for any type of virtual teaching or learning! In addition, the ear tips are some of the best I have used. We would recommend this product! Many of the pieces of wood were damaged and the doors do not align the same on both sides with a wider gap on one side.