A computing device can include one or more processors, and a charging module operable by the one or more processors to determine a charging state of a second computing device, responsive to determining that the charging state of the second computing devices indicates the second computing device is operatively coupled to a power source, output by the first computing device and for display, a notification, and responsive to determining that the charging state of the second computing device indicates the second computing device is disconnected from the power source, send, by the first computing device, to the second computing device, an indication of the notification.