Use your device without fear when you have the Amplius Rubico Smartphone Battery Storage Keychain. This compact device upgrades your smartphone instantly. It offers USB storage so you never have to worry about storage issues on your phone. Simply plug in, open the app, and transfer all the media you want. Rubico comes with a 16GB SD card but it’s also compatible with cards up to 64GB. In addition to all the extra space, Rubico also offers extra power. Tucked inside the small device is a powerful 1500mAh battery. With this, you can top up your smartphone on the go wherever you go. The durable exterior measures just 65mm long so you can easily store it in your pocket, bag, or purse. Rubico is highly practical to use and solves all the issues of current smartphones.