HydraCell Fuel Cells are at the heart of the HydraCell product line. Containing a proprietary membrane cathode, electronics and patented design that improves application performance. The HydraCell can be stored for 25+ years prior to activation. It is activated instantly to full capacity simply by dipping in water. Once activated, the cell will operate continuously, requiring only periodic re-hydration. After 200+ hours depending on the load & usage, the cell may be refurbished to provide additional usage hours.