How to Make a 50,000 mAh Power Bank from Scrap Laptop Battery
*3S 12V 25A 18650 Lithium Battery Protection Board
*DC 4.5-40V To 5V 2A Step-Down Power Supply Module
*12V DC Power Adapter Charger
How to Make a 20,000 mAh Power Bank from Scrap Laptop Battery
How to recycle Lithium ion batteries from Scrap Laptop Battery to make a cheap & powerful power bank to charge your mobile every where!
-Power Bank Mainboard: https://goo.gl/K9ePtV