Samsung Fast Charge 5200mAh Battery Pack , Gold For devices with Fast Charge,** charge your battery from 0 to 50% in about 30 minutes* 5200mAh capacity for extended use and multiple charges Multi-LED Power Indicator Charge the battery pack and all devices connected to the battery pack overnight with pass-through charging Official Samsung lithium ion batteries are built-in to ensure an optimal charging experience for a range of Samsung or non-Samsung devices