20000mAh capacity can charge your iPhone 7 about 6 times, iPhone X almost 5.5 times.

 it is universal fits for iPhone 7 6S/6/5S/5, iPad, iPod, Samsung, HTC, tablets, digital cameras, 
game consoles and MP3/MP4 players, etc. 
With such high capacity, in such a compact package, it is perfect for camping, climbing, picnics and business trips. 
It is your optimal choice to carry anywhere with a compact size.