Never let your phone die on a camping trip again with the help of the Brunton ReSync 3000 Portable Power Pack. With an integrated . 5 Watt solar panel, this portable power pack includes a two in one adapter cable to let you recharge up to two smartphones in emergency situations through a 2. 1A output. When the road gets rough and the weather looks ominous, the ReSync 3000's silicone exo shell stands tall with shockproof and waterproof protection. The low profile design makes packing a breeze, and the planet friendly, high yield lithium cells keep wasteful alkaline batteries out of landfills.