Drink safe on or off the grid with SteriPEN® AdventurerOpti water purifier and Solar Charging Case.  Solar Case charges one double-cell RCR123 rechargeable (7.2V) Lithium-battery (included) via solar power or 110V/240V wall adapter.  The UV lamp in the AdventurerOpti provides 8,000 water treatments and optical water sensor provides bonus LED flashlight.