The HydraCell FL-ALL High Impact Aluminum Flashlight designed for all purpose or emergency use. Great for emergency and security details. It can be stored for 25+ years in original packaging and still be ready to go when you need it most. This is not an ordinary flashlight, it is a reliable source of light when you need it most. The replaceable HydraCell fuel cells can be stored prior to first use for 25+ years and is activated instantly to full capacity simply by dipping in water. Once activated the cell will operate continuously under load, requiring only periodic re-hydration. After 300+ hours, depending on load & usage, an inexpensive new or refurbished HydraCell fuel cell immediately restores the flashlight to a like-new condition.