What is inside a portable charger

What is inside a portable charger

By: Kaelin Carlsen

 

 

I wonder if you could make a portable charger from simple materials all engineers know about.

If you can make it anyone can

I found a link on how to make a power bank/portable charger

 

http://www.instructables.com/id/How-to-make-a-portable-phone-charger/ 

This relates to electrical engineering because it sends electricity to the power bank and then into the phone charger then to the phone to charge it.

Here is a video of what is inside a portable charger.