Accessory for iPhone / mophie's Juice Pack Powerstation Duo features an advanced high-output battery that provides ultra-fast charging for your iPod, iPhone and iPad. It charges your iOS devices with up to four times the current of traditional 500mAh batteries. Plus it offers the ability to switch among a 500mAh charge (typical), a 1A charge and 2.1A level that's ideal for iPad. Sustainable technology Thanks to improved conversion efficiency more power actually makes it to your iOS device. Stylish design The soft-touch finish and metal band complements the design of your iPhone, iPad or iPod touch. Invisible LEDs To maintain the sleek look of the Powerstation Duo, the four LED status indicator lights disappear when you're not using the battery.