Activity pattern based battery charging alerts for mobile devices

1. A method for providing activity pattern based battery charging alerts for mobile devices, wherein the method comprises: monitoring usage patterns of a mobile device at a phone service provider; determining periods of activity and inactivity for the mobile device's usage at a system level monitor from call logs received from the phone service provider, the system level monitor being separate from the mobile device; creating at the system level monitor an activity log detailing the determined periods of activity and inactivity; monitoring levels of available battery charge for the mobile device at the mobile device; providing the levels of available battery charge to the system level monitor; correlating the levels of available battery charge with the activity log; and generating at the system level monitor a charging advisory alert in response to at least one of: an available battery charge dropping below a threshold value prior to a period of device inactivity, or toward the end of a period of activity; and providing the charging advisory alert to a device other than the mobile device;

wherein the charging advisory alert is provided by the instant message (IM), short messaging service (SMS) or electronic mail (email) to the device other than the mobile device;

wherein the device other than the mobile device is a set top box configured to provide the charging advisory alert to a user while the user is watching video content.