EnerPlex Jumpr Stack 3 Power Bank for Smartphones, MP3 Players and Other Mobile Devices (JU-STACK-3) Can charge smartphones and other small USB-enabled devices Tethered micro-usb and lighting connector outputs Charge multiple jumper stacks simultaneously via innovative magnetic stack and charge capabilities Chain your stacks vertically together to charge larger, Power-hungry devices Recipient of 2015 red dot product design award