It runs for three hours in continuous mode and six hours in intermittent mode. (geekwrapped.com)
I also have several other electrical issues going on: the headlight switch does not work reliably (I'm working around this by putting a jumper between the parking light and headlight fuses in the fusebox so that the parking lights turn on the headlights too) and the wipers sometimes don't work on intermittent mode. (mechanics.stackexchange.com)
Nicole, a mom, and an essential oils consultant recommend diffusing lavender essential oil either at bedtime on continuous mode or on intermittent mode to last longer. (verywellfamily.com)