There are lot of powerbanks in our market. But some are very useful and some harm our smartphones. Good powerbanks gives us lot of power and battery backup. But the local brand powerbanks harm our devices. It reduce battery life of smartphone. It help in forest or any place where nothing electrical energy. We can charge the powerbank for best backup. It is very useful.
It us used in tours. Some brands very famous for powerbanks. But its costs too high but it give great battery backup. There many port in one powerbank for many smartphone. It is very benificial for smartphone . It is comparitible to all smartphones.