When does PIE turn off automatically? Bagel Labs August 07, 2018 09:23 Updated Follow After two minutes of inactivity, PIE will automatically power off. Related articles PIE's display won't turn on I am getting different results whenever I take waist circumference measurements. Why is that? How long does the battery last? Does PIE have an internal memory to save measurement data? How long does it take to fully charge PIE? Comments 0 comments Please sign in to leave a comment.