EasyAcc 20000mAh Power Bank(4A Input 4.8A Smart Output) External Battery Charger Portable Charger for Android Phone Samsung HTC Smartphones Tablets - Black and Gray 20000mAh High Capacity: Charge an iPhone 7 6 times, a Samsung S7 5 times or an iPad Mini 3 2 times. Life Saver: Unique 4A Dual ports input, can be superfast recharged in 6 hours, reduce the recharging time up to 50% than usual 20000mah battery. Fast Charging: 4.8A Output with 4 USB Ports. Auto detects and changes its charging speed unique to your device for fastest charging speed up to 2.4A (2 times faster than a computer USB port). Charging 4 devices simultaneously. Safety Protection: Effectively prevents your devices from overcharge, overcurrent and short circuits as well as conform to CE, RoHS, and FCC. Just One Enough On-the-Go. The Top Rated Power Bank. Outstanding customer service provides 18 months warranty.