Wrong, with Palights off is off, the constant on feature can be turned off my holding the button down for 2 seconds. I don't find the constant on feature as handy as they say because of the rubber coating blocking the light on the side, it only works as a flashlight finder of the light is pointing at you.
The advertised constant on time is about 2 years. Normally I store batteries seperatly from my flashlights when in kits but have had no problem with 9Vs.
As a survivalist I make sure I have at least one flashlight at home for every major battery AAA, AA, C, D, 9V. Almost every home has a smoke detector with a 9V. Also after a week long storm I went to replenish my battery supply and all the AA and D batteries were gone. Still lots of C and 9V batteries were left because few companies make flashlights for those batteries. So do you need a 9V flashlight? Yes! During an extended emergency when all the AA and D are gone from the store you will still be lighting up your life with all the C and 9V still left in the store.