Southern Regional Drager BG4 Exam Taken from the 2019 Southern Regional Mine Rescue Contest held in New Iberia, Louisiana Progress Indicator: Question 7 of 30 7.  When the battery life is nearing its end, the following occurs. (answer the question for your gas instrument) For the iTX, with a minimum of 30 minutes of battery life, the unit will emit a periodic tone. For the MX6 iBrid, if the remaining runtime is less than 30 minutes, "Low Battery" is displayed. Choices: True False