Karnotech REMAX 6000mAh Power Bank with 2.1A Output, Super alloy Battery Pack High Capacity Portable Charger for iPhone, iPad, Samsung Galaxy, Android devices RPP-30 Silver Large capacity of 6000mAh, enough for charging your iPhone 6 three times, dual USB ports for charging 2 devices at one time (1A each when charging together) Durable zinc alloy surface with fingerprint-free technique Fast charging: 1.5 hour to charge you iPhone Smart shunting: protect your devices by providing different current for different charging status Built-in circuit management system and super polymer cell bring safe and fast charging rate, overcharge protection and power saving.