Be prepared for survival emergencies without yearly replacement of costly batteries! The Forever Light® will allow you to be ready for any emergency when light is needed. It’s always ready for action just add almost any water based solution, including sea water, soda, coffee, urine, etc. To activate the special built-in battery which has a 25 year dry storage life without losing battery power. Bright focused beam provides light for signaling, repairs or map reading. Stay put pedestal helps position and direct light source. Can be stored in extreme temperatures almost anywhere–car trunk, survival kits, aircraft, boats, etc. With out any life degradation. Water-activated battery is not replaceable; one time use only. Provides 5 hours continuous or 12 hours of intermittent use. Measures 7" x 2"