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: [email protected]

My Patreon campaign:   / sorindiy  
My Facebook page:   / sorindiy  
My Instagram:   / sorin.diy  

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

List of components:
Project box 200*120*75mm: https://s.click.aliexpress.com/e/_Ddh...
HG2 18650 3000mAh cells: https://s.click.aliexpress.com/e/_ArzHnn
18650 cells holders: https://s.click.aliexpress.com/e/_DBi...
4S battery indicator: https://s.click.aliexpress.com/e/_Des...
4S BMS with balance: https://s.click.aliexpress.com/e/_9gEfjB
Rocker switch: https://s.click.aliexpress.com/e/_98sHdO
12V relay: https://s.click.aliexpress.com/e/_Dmy...
Heatsink 20x14x11mm: https://s.click.aliexpress.com/e/_De0...
Mini360 buck converter: https://s.click.aliexpress.com/e/_Dk6...
Fuse holders: https://s.click.aliexpress.com/e/_Deo...
1N5404 diodes: https://s.click.aliexpress.com/e/_ANVBhF
2200uF 25V capacitors: https://s.click.aliexpress.com/e/_Dkr...
XL4015 buck converter: https://s.click.aliexpress.com/e/_DdP...
XL4015 CC/CV charger: https://s.click.aliexpress.com/e/_DFd...
150W boost converter: https://s.click.aliexpress.com/e/_9QUqvN
5.5x2.1mm jack (male, 22AWG): https://s.click.aliexpress.com/e/_Dmq...
5.5x2.1mm female connector: https://s.click.aliexpress.com/e/_DdI...
4.0x1.7mm jack: https://s.click.aliexpress.com/e/_DB6...
4.0x1.7mm female connector: https://s.click.aliexpress.com/e/_Dnl...
M3 standoffs 300pcs: https://s.click.aliexpress.com/e/_ACv729

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