This is an Ultra High Capacity 20000mah power bank with premium LI-ion polymer battery cells that add which add battery life to your phone, tablet, or digital camera. It is Dual Port which enables you to charge up to two devices at once. The output is 2.1A and input of 2A, it also has a multi-protection safety system which provides surge protection, prevents short circuit, and gives advanced safety features to keep you and your device safe. Smartphones are loaded with a lot of mobile applications that are powered by efficient processors for fast operations. These high performing mobile devices consume a lot of energy provided by the battery, hence the need for this reliable mobile accessory to boost the battery so as to enjoy the various features available on them on the go with little or no interruption. With a whopping 20000mah capacity, the Oraimo Titan got your back for days.