The present invention relates to methods, a location tracking system and a portable location tracker for low power consuming uses cases when the state or position of the tracker needs to be determined also when the tracker is outside short-range wireless communication range with a mobile communications device. The technology disclosed further relates to a low power consuming location tracker system for controlling a plurality of portable location trackers comprising a movement sensor and a remote control and monitoring system for communicating with the portable location trackers via a cellular radio communications network.
