MiLi HB-P18 18000mAh Battery Power King High-Capacity Portable Power Bank for iPhone/iPad/iPod/Laptop/Digital Camera/Tablet/Smartphones - Retail Packaging - Black Capacity: 18000mAh; Input: DC 19V/3.5A (max); Output: DC 16-20V/3.5A (max); DC 9-12V/2A (max); USB 5V/1A or 2.1A (max). Self charging time: 4hours Provides nearly 100 percent backup power for laptops The piano-like coating finish adds to the aesthetic appeal. Provides nearly twice the capacity of a tablet Supports simultaneous charging of a mobile phone and a laptop