That wont work with autoRCM. It will just turn itself back on again. To get a true power off you have to do it from one of the bootloaders. I use hekate when I want to really power it off. Since it stays in my dock most of the time I just use sleep mode. Never had a power drain issueeither it's off or the battery is already dead. lol. but if in doubt hold the power button for 15 seconds to make sure it's off.