The Mophie 3421PWR26KWRG power reserve 1X is a compact yet powerful mobile charging solution for any smartphone. Simply use a USB cable to connect your device and press the status button to begin charging. power reserve uses 1.8A output and Mophies smart adaptive charging technology to identify your connected device and always deliver the fastest, most efficient charging speeds available. Power through a full day with ease. The convenient design is small enough to fit in any pocket or handbag, making this the perfect accessory for your active lifestyle. The LED status indicator displays battery levels and charge status.