How to Make a Smartphone Battery Power Bank ⚡

↪ Hello, it is SuperTech and today I am going to show you how to make a smartphone power bank from an old laptop !

↪ The video show you all the steps to make the project with English subtitles.

⚡ Material List

↪ 1 external battery box: (https://goo.gl/GDW1TQ)

↪ 4 batteries (from old laptop or https://goo.gl/p3CaXp)

↪ Follow this diagram to avoid making mistakes.

↪ If you have questions or have a problem, let me help you.

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