The post discusses an innovative ultra-low-power localization tag that utilizes cellular signals for tracking. It highlights a unique method of identifying 4G base stations through a modified signal processing technique, allowing for sub-100 meter localization accuracy while being power-efficient. User comments raise questions surrounding data transmission capabilities, potential applications for tracking containers, and the challenges of obtaining accurate cell location data, particularly stressing the lack of a global truth source. The technology shows promise in urban environments but faces challenges in dynamic range and interference from nearby signals, which may limit its practical application. Overall, the idea of a compact, energy-efficient tracking device has potential, but various real-world constraints warrant careful consideration before widespread deployment.