Firetext by SMS
Here is a clever standalone battery-powered smoke alarm with SMS capability. It does not need mains power. When its smoke detector detects a fire condition, it awakens the integrated GSM module. The GSM engine sends a warning text to a maximum of four mobile numbers. The FIRETEXT smoke alarm has a 9V Lithium battery that will provide a minimum of 36 continuous activations, and average use should result in a battery life of two to four years.
More at firetext.me.