Southwest airlines bans all humanoid and "animal-like" robots from flights regardless of their size and purpose. This ban took place due to recent incidences, one where a customer bought an additional seat for their humanoid robot, and mentioned to the flight attendant that its lithium battery exceeded the maximum allowable size, causing a flight delay. Another incident involved a robot causing confusion on a Southwest flight out of Las Vegas. Due to this and other related incidents, Southwest airlines restricted portable chargers and lithium batteries to one per person, and additionally banned it from being stored in the overhead bins and checked baggage's. Southwest airlines made this move to prevent further confusion over what a passenger can and can't bring.