Does your phone run out of battery in the middle of the day?If so You can build this portable charger to keep your phone charged throughout the day. To build this charger, you need access to a 3D printer, a battery Powerboost 1000 receiver board, and a Qi basic kit. This charger is very useful since you can use it to charge your phone while traveling. It can also charge your other devices like AirPods. For more information you can go to this link:

https://learn.adafruit.com/portable-qi-charger/

This relates to engineering because you have to design an build a charger for your devices. You have to keep in mind the size and portability of your charger. Also, you need to make sure that your charger outputs the right amount of voltage, otherwise your device won’t charge.

Here is a video about this: