Perfectly sized for carrying in your wallet or purse, the Monster PowerCard is perfect for emergency charging on the go. This convenient portable battery charger connects to your smartphone via USB to provide a quick and easy recharge. PowerCard features a 1,600 mAh Li-Polymer battery to provide all the power you'll need to give your mobile a boost, delivering up to a full days charge depending on your type of device. With a charging speed of up to three times as fast as standard USB chargers, PowerCard is an efficient way to boost your battery on the go. It features Auto Sensing Technology to ensure that your device is charged at the right speed, while three LED lights function as battery level and charge level indicators, so you can keep an eye on your reserves. Includes USB to microUSB cable for charging smartphones with a microUSB port. iPhones require an existing Lightning or 30-pin to USB cable (sold separately)