Build a Power Bank QC 3.0 and Power Supply Voltage - Part 1 Make a 4S 10000mAh Battery

How to make a Power Bank QC 3.0, and Power Supply Voltage 1,2 - 35volt 2 in 1

- Part 1 Make a 4S 3P 10000mAh Battery with old bike battery

Materials to include
+ Old bike battery
+ 2pcs Module Buck DC to DC Converter
+ 150W Boost Adjust Module
+ 30A 4S Li-ion battery L charger with PCB protection
+ Watt Voltage Meter
+ 2 PCS Module Power Bank Quick Charge 3.0

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