Im a big fan of xiomi products and products are also value for money.im using this power bank since from one year no complaint regarding any thing it can charge two times the mobile on a single charge it is very good during traveling.so it can be very usefull no need to worry about charge .there is battery indicator which will tell you how much battery is left in it so that you can charge based on it and it very thin can feet into your pocket and brought it during offer period so I got at low price and bery nice product