Charge your smartphone - even when you can't get to a wall outlet. Portable, slim and lightweight, the Power Pack 2000 is the perfect way to ensure your battery won't run out when you're on the go. With 2000 mAh of power, it has the capacity to full charge a cell phone twice or a smartphone once.A USB to micro-USB cable is included for both charging your battery and recharging the Power Pack. To charge, simply plug the micro-USB into your device and plug the USB into the power pack. A convenient charge indicator lets you know how much power is available. When it's time to recharge, just flip the cable and plug it into your computer or another power source.