We’ve all been there: running out of power on your cell-phone with no prospect of a charger in the near future. It’s one of the most frightening possible scenarios for a lot of people these days.

Naomi Kizhner, an Israeli graduate student, may have solved that problem. Naomi designs jewelry that harnesses your body’s energy to generate electrical power.

Some of her devices are a little bit creepy- they are embedded into the wearer’s veins, and then use the wearer’s movements and blood flow to turn a small wheel inside the device, generating electricity.