Powerbanks | buying tips

In this modern world, humans need to have an access to power in any place because of the electronic devices that they carry, so the researches find out a solution for that and they created "Power bank".
Power banks as their name, are a place that can store power or in the other words "electricity", these devices come with many size, shapes and colors, how ever not every power banks are suitable for use.
There are many manufactures that make power banks, mostly as you know are from "China", some have good quality and some don't.
The best power bank brand is Xiaomi, which is from china, but has a very good quality for charging or even breaking someone's head.
Other brands from china, which don't have a name, is a piece of junk, they don't print the real capacity, their battery's are old and they don't have a good resistance against humidity, heat, or even shock, they are usually cheap and many people buy them. Remember that advice that said: "Nothing is cheap for no reason."

• Check the body before purchase.
• Make sure that they have a recognized brand and they have a "How to use" paper inside.
• There are no power banks under $ 20 that have more than 10 ampere.
• Never put in direct sun except for solar one's.
• Never put in high humidity.
• Don't use your device when plugged to power bank.