If a device is advertised as being "military grade," that doesn't necessarily mean it was developed for military use, but rather rigorously tested against MIL-STD 810 standards. This testing process runs devices through extreme conditions to simulate what soldiers may encounter during deployment or combat. The standards compare device performance in situations where it may be violently dropped, thrown, or even exploded. They also test how devices hold up in heavy rain, high and low temperatures, coming into contact with chemicals, and resist dust and fungus infiltration. Most commercially available "military grade" devices are tested for drops, shocks, and water resistance.