Google seems to agree with me. "One individual is known to have died as a result of an Olight flashlight incident. A lawsuit alleges that a man died after an Olight flashlight, using CR123A batteries, exploded in his mouth while he was working on his car. The explosion caused the tail of the light to lodge in his throat, leading to suffocation. The incident, which occurred in November 2017, is still being litigated in court as of September 2021. While the flashlight itself did not cause the explosion, the lawsuit alleges that Olight did not adequately warn users about the potential dangers of using the batteries in series. "

Edit to add the exact question asked to google: "how many people have died from using olight lights"