RAVPower 16750mAh Portable Charger Most Powerful 4.5A Output External Battery with iSmart Technology The prodcut looks and works like-new. The product includes all original accessories, and is backed by 6 months warranty. 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. 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.