Goal Zero Venture 30 7800mAh Waterproof Power Bank, Dual 2.4A USB Ports Built-in Micro USB TipTangle-free charging for phones and tablets; Certified cables for efficient charging Solar ReadyBuilt-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 UseDunk 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 PackPower phones (2-3x), tablets (1x) and more; Lightweight and packable from the airport to the trail High-speed USB 4.8A across dual ports,Two high-speed ports capable of dishing out the fastest charge possible, at the same time; Power two devices at once or share with a buddy; Integrated Flood Charge optimizes your charging time