3 ms·Show HN: A DIY airgapped, e-ink TOTP device12 points by karmanyaahm 3y agowkat4242 3y agoInteresting. I wonder what the battery life is though on that single CR2032.karmanyaahm 3y agoWith my usage of checking OTPs 3-4 times a week, it lasts for ~3 months.