DIY UPS with 12V and 19V (for Asus router) part 1/3

Hi, guys! I finally finished building this UPS. It has 2 outputs of 12V and 19V and a big capacity, even bigger with better li-ion cells. A lot of you asked me to make it and because you are my favorite subscribers :) here you go!
This is a big project with a lot of details, so I divided it into 2 videos.

Feel free to visit https://jlcpcb.com to order professional PCBs at low prices for your projects. $2 - 2Layers 5pcs; 4&6Layers starting at $5.

A big THANK YOU to all my patrons, especially to: Richard Fjellvang, David, Max Rice, Razvan Alexandru, Jacek, techge, Anthony Ortenzi.

If you are a nice lad and want to donate to me on Paypal, here you go: melcumlk@gmail.com

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Full schematic: https://i.imgur.com/aRKuvr5.png

List of components:
Project box 200*120*75mm: https://s.click.aliexpress.com/e/_DllO4cp
HG2 18650 3000mAh cells: https://s.click.aliexpress.com/e/_ArzHnn
18650 cells holders: https://s.click.aliexpress.com/e/_DemYa1D
4S battery indicator: https://s.click.aliexpress.com/e/_c45HSqDP
4S BMS with balance: https://s.click.aliexpress.com/e/_9gEfjB
Switch 4 pin: https://s.click.aliexpress.com/e/_c3dsT8Lh
12V relay: https://s.click.aliexpress.com/e/_DmyevaZ
Heatsink 20x14x11mm: https://s.click.aliexpress.com/e/_oBSQ66z
Mini360 buck converter: https://s.click.aliexpress.com/e/_c3csVuGf
Fuse holders: https://s.click.aliexpress.com/e/_Deo0Cnb
1N5404 diodes: https://s.click.aliexpress.com/e/_c4Cq9C3Z
2200uF 25V capacitors: https://s.click.aliexpress.com/e/_Dkr7FdX
XL4015 buck converter: https://s.click.aliexpress.com/e/_opIriGX
XL4015 CC/CV charger: https://s.click.aliexpress.com/e/_oDYozPf
150W boost converter: https://s.click.aliexpress.com/e/_c3w4c81b
5.5x2.1mm jack (male, 22AWG): https://s.click.aliexpress.com/e/_Dmqj3G5
5.5x2.1mm female connector: https://s.click.aliexpress.com/e/_omTRsZL
4.0x1.7mm jack: https://s.click.aliexpress.com/e/_oFG0YzJ
4.0x1.7mm female connector: https://s.click.aliexpress.com/e/_Dnlqv5J
M3 standoffs 300pcs: https://s.click.aliexpress.com/e/_oCljU81

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