You could put your mod in stealth mode and I don't think you will notice any extra vaping time. My sigelei Mini has a bug in the firmware if you vape up to the 10 second cutoff, the display will never turn off. And it will sit for days with the display lit.I don't think the screen kills the battery as much as you think. I have left my display set too 100% for a month and then switched it to 50% for a month and no noticable difference.