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

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 onboa