Iv been looking for a powerbank for my Macbook Pro for years. I managed to find one years ago at the price of $300, too much.
The only component I ordered was the custom Apple cable. Here is the shopping list.
Ok, lets get started with the project. This project can be completed by a beginner, its not complex at all. You just need to ensure its completed correctly as it may cause damage to your Macbook is connected incorrectly.
Once we connect the two, we must ensure we seal them correctly using some shrink seal.
I finished and connected it to my Macbook Air 11″, worked straight away. You must ensure that positive and negative is connected correctly. This is achieved by using a multimetre.
If your happy with the results then you can connect it to your laptop, you should see the green light which will then turn to orange indicating that its charging.
Im really happy with it. I did a test of it charging capabilities. I charged the powerbank 100% and then connected it to my Macbook Air which had 15% charge. It charged it to 48%. Its probably around an extra hour of operation on the Air. Enjoy!