12V Portable Power Bank (with Type C Power-In)

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I Need A 12V Power Bank For My Diy 14" External Monitor When I Am Working With Servers And Rendering Nodes. However, Commercial Options Are Expensive And Thick, Which Is Not Ideal For Bringing It Anywhere. With That, I Present You My Diy 12V Power Bank With A Type-C Power Input Port And A Dc5.5 Output. Material List: 2X 105575 Li-Po Battery (5000Mah) 1X Dc Connector 1X Mt3608 Step Up Converter (It Is Super Hot When Under Load) 1X Tp4056 Charging Module (I Got One Which Has 4X Tp4056 Onboard With Max Input Current = 3A) 1X Type-C Breakout Board 1X Kcd1 Switch (Size: 21.5 X 9.5Mm) 1X 1S Li-Po Battery Capacity Display Unit (Size: 60 X 15X 3Mm) Some Super Glue And Wires Steps: 1) Print Everything 2) Buy Everything 3) Connect Battery In Parallel (So The Output Is Still 3.7V) 4) Connect Everything 5) Use It Wire Connection: Charging Circuit <==> Battery+Capacity Display <==> Step-Up Converter <==> Switch <==> Dc Output (I Use 22Awg Wires) Notes: The Spec Sheet Of The Battery State That The Max Charging Current Is 1C Which Means 5A Input (If I Can Still Remember Physics) So As The Input Is Shared Between 2 Batteries Each Having 1.5A Its Well Below The Safety Limit, I Would Recommend Changing The Input Current To 4A Just To Reduce The Charging Time. More, The Discharge Rate For The Battery Is Spec-Ed At 0.5C Which Means With 2 Batteries I Can Draw 5A Current, Which At 3.7V It Will Be 18.5W Max. The Mt3608 Has A Maximum Input Of 4A Which Only Allows 14.8W. I Did Overload The Step-Up Converter Since My Monitor Draws Around 21W In Total. I Don'T Recommend Doing That Unless You Know What You Are Doing. I Bypass The Connection For The Switch For My Own Power Bank Since I Won'T Be Needing That Feature But I Leave There As An Option. The Runtime For My Current Setup Is 5 Hours And 41 Minutes And Charging Take Around 6 Hours Too So I Would Say It Works Great. So You May Say What Is The Point Making Something Like This Rather Than Using A Step-Up Converter Cable For A Normal Usb Power Bank? And The Answers Are As Follow: 1) Usb Power Bank Normally Have 5V2A Output Which Is Less Than What I Needed 2) Qc3.0 Power Bank Which Supports 12V Class A (18W) Is Great But They Are Costly 3) It'S Just An Excuse For Me To Use My Sla Printer 4) Diy Is Just More Fun Than Buying

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