At 5200mAH this portable and lightweight extended battery is small enough to easily fit in a purse, briefcase, backpack -- even in the palm of your hand. This powerful battery has a modern slim, sleek, and stylish design. It contains a rechargeable 5200mAh lithium ion battery. It's strong enough to charge your smartphone or tablet and the double USB protector allows them to charge at the same time. iPhone 4/4s cord and iPhone 5 cord are not included, but do work with the unit. Micro USB cable and velvet bag are included. When life takes you away from an electrical outlet, Powerocks are just the thing to keep you connected by charging smart phones, tablets or other USB-chargeable devices. Conveniently small and surprisingly powerful, these handy batteries easily go wherever you do.