(new) power bank for Arduino using 18650 battery

Used (or New) 18650 battery + DIY Power Bank Case

I tried to make a DIY power bank by using a kit.

18650 batteries are well known as Tesla's battery. it is simple and powerful. somehow , I wanted to reuse my laptop's battery so that I can give power to my arduinos. Here is my hands on video.

(Amazon)

• 18650 battery https://amzn.to/2udROV6
• Charger https://amzn.to/2KG3c0q
• USB Current meter https://amzn.to/2jvBRS8

(Ebay)

• 18650 battery https://ebay.to/2wdVAil
• Charger https://ebay.to/2wgFRPx
• USB Current meter https://ebay.to/2HYayKH

(aliexpress)

• 18650 battery http://s.click.aliexpress.com/e/ByjMvBi
• Charger http://s.click.aliexpress.com/e/Qf6IiYf
• USB Current meter http://s.click.aliexpress.com/e/A2n6Iae