For a reason yet unexplained, emeralds seem to have the almost unique ability to store PPE. Though this is inconsequential to the average person, it is very helpful to mages. Many Techno-Wizards have taken to designing jewelry as PPE reserves.

Typical Large Medallion: 20 PPE, Cost: 2500 credits

Typical Anklet or Bracelet: 15 PPE, Cost 2250 credits

Typical Ring: 10 PPE, Cost 2000 credits

To Create: The jewelry required and an emerald worth 1000, 750, or 500 for medallions, bracelets, and rings, respectively. The PPE requirement is just twice what is needed to initially charge the battery.