I purchased intex powerbank last year.i have been using it since 1 year and my experience says that it is good but not best.It charges my phone at a very slow speed whereas compared to tp link powerbank.if we use the powerbank while using the mobile it will charge 10 to 20 percent battery in more than half an hour.otherwise it is good as it fulfills our need while travelling.i purchased it online at price of 900.