I bought it 5 months ago it was good at first charging my mobile 2 time and more but than I shifted to mi 7pro and now it only charges it two times with battery almost half and the battery backup for the phone is only 4000mah that means its only giving around 7000mah.
Which can be more I am not that precise but if it was going to give only that much than the company should have shown that less the 9000 mah aleast but I guess when you have a big name for the brand you can do anything.
So if you are thinking of buying it you should check other options first than decide.