The MIXIT↑ Power Pack 4000 lets you keep your devices charged no matter where you are. This versatile charging device has two USB ports so you can charge tablets, e-readers, and other USB-enabled devices even when you don't have access to a power outlet or a computer. Simply charge the battery pack before leaving your house and connect it to your device using your USB cable whenever you need a charge. The MIXIT↑ Power Pack 4000 ensures that you'll always have an extra charge within reach. And it has two USB ports, which means you can charge a friend's smartphone at the same time that you charge yours. With its compact and lightweight design, it's ideal for travel and easily slips into any handbag or backpack. With the MIXIT↑ Power Pack 4000, you'll always have a reliable backup if you run out of charging options. The battery pack is rated for 4,000 mAh and remains charged for days after you last plugged it in. Use it to provide your phone with a quick boost for those times when you need to make a call or text.