External Battery, GMYLE ®2500mAh Power Bank Ultra Compact Card-Sized Portable USB Charging Adapter w / built-in flash & Micro-USB cable for charging USB devices (Black) (Office supplies & stationery)
Small and handy, it fits anywhere in deashalb and the adapter for Apple devices is safely hidden, the only drawback is a lack of charging cable, so you have yourself a suitable cable organized
