Piston Power Pro 9000 is an 11.5mm sleek, portable, super battery pack that is thoughtfully designed for on-the-go use. The high capacity 9000 mAh battery has enough juice to charge most smartphones up to 5 times, or tablets up to 2 times. With the built-in LED battery indicator, you know just how much juice you’ve got left. The built-in Smart IC Chip auto detects your device and provides the most efficient amount of current (volts). This will help decrease charging time and will preserve your device’s battery!