Mobile, unitary, wall-plugged, temperature and/or power monitoring and warning system for critical spaces

A method for monitoring temperature and utility power status with respect to a space and alerting a user when an alarm condition occurs, the method comprising:

• providing a system comprising:
• a housing;
• an electrical bus attached to the housing;
• a connector module attached to the housing for connecting the electrical bus to a power source;
• a battery module attached to the housing and connected to the electrical bus so as to provide power to the electrical bus when the power source is not supplying power to the electrical bus;
• a sensor module attached to the housing and powered from the electrical bus for monitoring temperature and utility power status with respect to the space and detecting an alarm condition;
• a user interface module attached to the housing and powered from the electrical bus for permitting a user to (i) store at least one telephone number, and (ii) store the current location of the system;
• and
• a cellular telephone module attached to the housing and powered from the electrical bus and configured to (i) place a cellular telephone call to a stored telephone number when the alarm condition is detected by a sensor, and (ii) advise the call recipient of the current location of the system;
• connecting the connector module to a power source;
• and
• using the user interface module to store a telephone number, and using the user interface module to store the current location of the system.