Tek Republic PowerStation Slim Premium Fast-Charging Portable Charger 2500mAh Rechargeable 2500mAh lithium ion polymer battery with built-in Micro USB with Quick 1.5 amp charge speed Built-in LED Power Status Light Portable, Slim & stylish design (3.54 x 0.34 x 2.28"); Easily fits into your pocket or bag to provide instant power; Perfect for road trips, long flights, or whenever you need charge your mobile devices.