More than 90 % of LoRaWAN end devices in the field run in Class A: battery-powered sensors (water meters, GPS trackers, weather stations, level probes), periodic uplinks (every 10 minutes to 24 hours depending on the use case) and 5-10 years of autonomy on an AA or lithium cell.

Class A dominates the installed base — easily 90 % or more of all deployed devices — because the vast majority of LoRaWAN sensors are one-way: they report their state and only rarely need to listen. Standard battery life targets are 5-10 years, and update intervals range from a few minutes to many hours. Representative examples include water meters (typically every 6-24 hours), GPS asset trackers (every 15 minutes to 1 hour), agricultural soil temperature probes (every 30 minutes to 1 hour) and smoke detectors (event-driven only).

Whenever a project starts talking about "sending a command to the sensor", check whether the action can wait for the next uplink window — switching to Class B or C just to push the occasional command often kills the battery business case.