Hey Stephanie, thanks for the feedback :-) Battery life can vary based on a lot of factors. If you're planning to use something like the 7- to 9-hour All Night mode, that's basically like a marathon for your Wave, so we recommend topping up the charge before and then after the session so you'll be ready for whatever comes next.

To make Embr Wave effective, we've prioritized cooling and warming power + small size + battery life, to get you as much thermal bang for your buck as possible in a lightweight wristband. That means some other functions might not have made the cut--but if there are some features you'd like to see added, please send us a message at embrlabs.com/contact. We love hearing about what our Wavers want us to build!