13 - Non Combustible Solids
Eyeshields, Gloves, type N95 (US)
Rechargeable solid-state batteries are becoming increasingly important due to wide-spread use in computers, portable electronics, and vehicular applications.
A significant limiting factor for wearable electronics and wireless sensors is the finite amount of energy that can be stored in on-board batteries.
The unique properties of the rare-earth elements and their alloys have brought them from relative obscurity to high profile use in common hightech applications.