i-Blason PowerSport 9000mAh (2.1A Output) Portable Charger [Water/Dust/Shock Proof] USB External Battery Pack with Intelli-Safe Technology for iPhone and All Other Smartphones and Tablets (Blue) Unique PowerSport series battery pack [Water / Dust / Crush Proof] design is perfect for both indoor and outdoor activities; Ultimate mobile power source for road warriors' cell phone and tablet devices Intell-Safe Multi-layer protection design ensures ultimate safety when you Very intuitive to use; LED indicates power level remaining the battery pack enabled by just one simple button click Strong 9000 mAh power capacity can charge most large capacity smart phones such as Samsung Galaxy S5 3 times Premium grade battery cells are adopted to ensure best performance for your device with fast charging time (6~7 hours)