Maze Wrap Around Water Resistant 3000 mAh Powerbank Bracelet Battery Pack, Blue Smallest thinnest smart charger on the market. Pocket friendly wallet sized portability (3.7"x2.4"x0.2"in) Smart charging ability, simply connect and begin charging automatically 2500mAh power capacity providing 1 extra battery life to most smartphones Grade A cells and premium chips ensure the highest quality and reliability. Built-in proprietary software to control and regulate temperature, voltage and current. Built-in micro-USB cable saves you the hassle of carry an extra cable around. Apple Lightning adapter included to charge the latest iPhone and iPad devices LED battery indicator will let you know when the flash charger is charged and discharged