Nice powerbank and when compared with mi powerbank 2i - - - it is not upto the mark.
When you have no idea about powerbank you will feel its superb.
Friends believe me, I used 3 power banks
1.ambrane
2.syska.PB 20000mAh, it's awesome product, use it
3.MI. Mi is better but Syska power bank is more better.
It charges phones in less time.
I'm recommend to buy it. I buy it from Amazon.