Artifacts
Artifacts are like cyphers in that they're more like special abilities than common equipment. Unlike cyphers, artifacts can be used more than once.
Every artifact has a special statistic called depletion, which is usually written as a number range, like "1 in 1d6" or "1-3 in 1d20." When you use or activate an artifact, you roll the die in the depletion stat. If your roll is in the depletion range of numbers, the artifact works, but that is its last use.
Some rare artifacts have a depletion stat of "-" which means they never deplete.
The GM has more information about artifacts.
Artifact depletion means you never have to keep track of how many charges an item has or its "battery level."