How long is the Dot battery life? 

A full charge provides each Dot with approximately 10 hours of use. The Dot should illuminate green when fully charged. If it does not, you can check the battery level in the Cosmo Learning app (under Dot Settings) or in the Cosmo Dot Setup app (formerly Cosmo Switch Setup). If the Dots won’t be used for an extended period, we recommend charging them periodically to help prevent battery deterioration.