No, the EMF harmonizer pendant necklace is not an electronic device that needs to be recharged like your cell phone, nor does it run out of energy or absorb negative ions in the EMF radiation you may come in contact with in the course of your daily routine. You just simply open the clasp, place the necklace chain around your neck and that's it - the EMF protection necklace does the rest. No plug-in chargers or steps to take to enhance energetic grounding of the jewelry.