I am using ambrane power bank from last year and I can say that the ambrane power bank is a good quality as compared to the others other power banks are also good but ambrane power bank has a good amount of charge for charging the phone for two to three times when I charge my power bank for one hour and after that I can charge my phone for two to three times it is available in the budget in different E-Commerce sites if you are going for a power bank then you can go for a ambrane power bank.