I have been using XiaoMi power bank since 2014 and the power bank is still working, but I found out there is this disadvantage where the charging port easily get dislocated. I rarely use the powerbank, it is still charging but the charging port have to be adjusted then only it will charge my phone and when you bring the powerbank around and it will get dislocated again. This issue happened on my friend as well. I thought my friend is just unlucky to get a problematic ones, who knows it happened on me as well. T_T