This power bank is having capacity of 20800 m a h the power bank actually have only 15 may 10000 MAH.
this person quality is very cheap compared to the price whispering can be used as a very very low purpose you can't use as a rough and tough and the quality of the USB port is very very cheap USB port is damaging again and again due to this USB port and power bank capacity is very low and its take long time to charge.
they are telling that you have two years warranty or 1 year warranty but they give only 6 months warranty and they are not changing their parts as compared to the quality.