METHOD OF CHARGING AN ENERGY STORAGE DEVICE

摘要

A system for charging an energy storage device includes an energy harvester operable to harvest energy from environmental conditions, and to charge an energy storage device at a first rate using the harvested energy. A charging input port detachably receives a secondary energy source. The secondary energy source is operable to charge the energy storage device at a second rate that is faster than the first rate. A sensing module is operable to sense a condition and to transmit a wireless signal indicating an occurrence of the condition.