This is the worlds smallest portable charger is made only out of cardboard so it’s good for the environment. These portable chargers are made in different charging hours and sizes. Four hours is the smallest one to six hours the longest and biggest one. The chargers can be sold in bulk. When you buy the portable chargers in bulk they come on a sheet of paper and all you do is pull them off and plug them into your phone. These chargers can be returned to the store you bought them from for recycling or recharging. This charger was created by Tsung Chih-Hsien.
This charger is related to engineering because you had to use electrical and environmental engineering to design and create it. In all this charger might be the worlds best, smallest, and most reliable portable charger yet.
