When country gets so huge and population so dense, it is hard for everything in the country to be well controlled. Hence, buying from a reliable source helps you with filter through inferior goods from China. As they will need to maintain their reputation to continue their business.
5000mah will never give you 5000mah, it might be reliable, but it is over reported.
5000mah will never give you 5000mah, it might be reliable, but it is over reported.