Keep your USB-charged electronic devices powered up with Coghlan’s 6000 mAh Portable Power Pack, which can be recharged by USB, solar, or dynamo cranking. Great for keeping your smartphone, tablet, and GPS devices charged, the Portable Power Pack stores energy in high-grade lithium polymer cells, has a water resistant case, and is small enough to be stowed away in your backpack or jacket pocket. When fully charged by USB, the Portable Power Pack charges most smartphones three times. A 10-minute solar charge and 1-minute of dynamo cranking should provide 10 minutes of cell phone talk time (charging time is approximate). Coghlan's makes the outdoors more comfortable and enjoyable with over 450 accessories for camping, hiking, fishing, and RVing -- from cooking gear to first aid kits, insect netting, firestarters, tent repair, and more.