The HC2D Oxygen Fuel Cells are the power source for HydraCell Orca Torch Light, Waterproof Flashlight & Aluminium Flashlight.HC2D cells can be stored sealed, prior to first use, for 25+ years.

They are activated to full capacity by simply dipping in water for 15 seconds. Once activated the cells will continue to  operate under load, requiring only periodic re-hydration.At the end of the useful lifetime of the cells, they can be easily replaced