Powerful And Stabilized 4.5A Output: Highest output in the market, featuring a 4.5A total output capable of simultaneously charging 2 tablets, making it faster and more powerful than the rest.Exclusive iSmart Technology: Charge faster and smarter than others, automatically detects and delivers the optimal charging current for any connected device- ensuring the fastest and most efficient charge.Huge Capacity: 16750mAh charges an iPhone 7 almost 5.5 times, a Galaxy S7 almost 3.5 times or an iPad Air once. Safely recharges with a 2 amp or higher output charger (most phone chargers have only 1 amp).Unique Design: Smooth, ebony varnish allows you to power up in style, while 4 status LEDs keep you informed of remaining capacity. Built-in flashlight for dark or low-light environments.Safety Protection: Ultra reliable A (plus) Lithium-Ion battery with over 500 battery charge cycles; Security protection design: short-circuit and over-current protection. This portable power bank will automatic shutdown if a short circuit or overload output occurred while unit is charging.