This portable power bank delivers 20000mAh capacity with dual USB charging ports that enable you to charge two devices simultaneously at optimized speeds of 2.1A and 1A. The slim aluminum alloy design includes four LED indicator lights that display remaining battery levels at a glance, so you always know when it's time to recharge. An integrated LED flashlight adds convenience for travel or emergency use. Advanced smart charging technology automatically detects your device and delivers the appropriate current while built-in safety circuits protect against overcharging, over-discharging, short-circuiting, and overheating. The compact form measures just 5.9 by 2.83 by 0.39 inches and weighs only 0.45 pounds, making it easy to slip into a bag or pocket for on-the-go power. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. The power bank operates in temperatures from negative 10 to 40 degrees Celsius and fully recharges in approximately five hours using the included 11.81-inch charging cable.