Mobile terminal and its information prompt method

The disclosed mobile terminal comprises: a charge-detection unit to detect the cell electric quantity of terminal, a query request unit for standby time to send request to a CPU, a CPU to extract cell charge message from the detection unit and obtain standby time message, and a prompt unit for standby time to output and prompt user the standby time. Besides, it also discloses the relative method. This invention ensures time accuracy and reliability, and increases terminal user satisfaction.