Walter Kaihatu, vice president of sales and marketing, Brunton of Boulder, Colo., holds the hydrogen core from a hydrogen battery pack during set up at the Outdoor Retailer Summer Marke

 

              Walter Kaihatu, vice president of sales and marketing, Brunton of Boulder, Colo., holds the hydrogen core from a hydrogen battery pack during set up at the Outdoor Retailer Summer Marke
Walter Kaihatu, vice president of sales and marketing, Brunton of Boulder, Colo., holds the hydrogen core from a hydrogen battery pack during set up at the Outdoor Retailer Summer Market Tuesday, July 30, 2013, in Salt Lake City. The Outdoor Retailer Summer Market opens for a four-day run Wednesday. More than 1,300 manufacturers and suppliers are packing every square inch of the floor of a Salt Lake City convention hall. Brunton says the battery takes hydrogen out of water and mixes ambient oxygen when it’s time to charge a cell phone. “It’s the lightest, toughest, most portable hydrogen reactor,” said Kaihatu. (AP Photo/Rick Bowmer)