Goal Zero Venture 30 Battery PackBuilt in Micro USB Tip Tangle free charging for phones and tablets; Certified cables for efficient charging Solar Ready Built in Charging Tip; No extra cables to lose; Charge up in 4 hours from USB in 9 hours of full sun from the Nomad 7 Waterproof in Use Dunk it, spray it, use it in the rain; Power that handles whatever Mother Nature can throw at you; No rubber plugs needed 30 Wh, 7,800mAh Power Pack Power phones (2 3x), tablets (1x) and more;