Mi is a good brand in india.This power bank is really good, it comes with metal body which is very strong, it is very light weight , it takes 4 hours time to full charge with 18 watts charger and it takes 6 hours with 10 watts charger.It is very easy for carrying in pocket and it is also a fast charging power bank which charges your phone very fast, for 3000 mah battery phone it will come 3 times for charging, the price is also less and best powerbank in 1000 rupees and for fast charging take this power bank