I have a micro-kit in a tin but I've not been taking it seriously. The stuff that I rely on is part of my EDC keyring or wallet, and I don't want to spend much weight on redundancy.

However, following the recent thread on Electro Magnetic Pulses, I am wondering whether I should use the tin for backups of electronic stuff. Specifically, my EDC compass is now a Casio watch and is vulnerable, and flashlights are vulnerable too.