I have brounght this Mi powef bank for 899 from amazon.and I am using it from more than 10 months. It is working very nicely, till now I have not faced any problem with it. We get one adaptor with this power bank , the adaptor is also good and this product is very nice. I would suggest everyone with my personal experience to go for this power band if they want so. It takes 2 hours to charge itself and it can charge any set for 3 times. It's very nice power bank and you can invest in it