SolaDyne Flashlight You never have to replace a battery or locate a charger just to operate the flashlight. It gets its power through solar energy and dynamo technology Features 3 super-bright white LED bulbs and cell phone chargers with a universal Nokia adapter. Focused lens concentrates the beam of light to maximize the output. 1 minute of winding = 30 minutes on high or 1 hour on low. 3 minutes of winding will provide 1-2 minutes of cell phone power.