How to make powerbank for smart phone

Hi! everyone! now you are staying in my blogger to reading some article, so don't forget this article that writing about how to make powerbank for your smart phone. It is so easy to make it by using some dead thing that some of people through it to recycle bin. Not please pull it up and do with me.
Material for we need to make powerbank such as below:
- Plastic Box
- 9 Volt battery
- 9 Volt battery conector
- Power off-on
- Car Charger
- Black and Red Wires 10cm

Now let watch this video for how to make it