The following article/section is conjecture. Content is subjected to change/removal as the game progresses. Please do not use this article for critical in-game information.
The Stun Baton is a default backup weapon for enemies that succum to Loki's Radial Disarm power. It is used by both Grineer and Corpus enemies alike, but only used by enemies who are not already melee-focused enemies like Butchers or Prod Crewman.
Trivia
This weapon used to be the default weapon for Prod Crewman, until they were fitted with proper Prova weapons.
It is currently used by Grineer Flameblades but in a variant that inflicts Fire damage, the Fire Baton.