Am using this power bank since from 6 month.it good performing very good experiance with this. it charges the mobile quit faster.it is very usful in traveling.it gives charges my mobile 4 time from 0 to 100.although ist charging cable is too short and it take 2-3 hours to full charge but its ok. and it has 4 pointing lights that indicat me how much percent of charge is left in powerbank.it seen that MI products are not as good ( from my opition) but this power bank is really good. am really impressed from this product