12V portable power bank (4S LFP 128 Wh) with USB charge/discharge

Remix from original idea by OK1BT @yourmum_52499 TNX!

100W discharge test

BOM

• 4x LiFePo4 10Ah [1] or [2]
  • Operate with terminal↑UP
• 3x short
• 8x M6 nuts
• 8x M6 cable eye
• 1x QC4.0 QC3.0 PD 5A 100W [1] or [2]
  • IMPORTANT!
  • Check if you have the correct type of battery protection chip BM3451BHDC-T28A on board, for LiFePo4
    
  • Check the correct resistors values are used.
  • The negative output voltage must be connected to Pin C- (underdischarge control, current protection)
• 1x DC jack
• 4x PowerPole terminal 30A
• 2x PowerPole black
• 2x PowerPole red
• 1x Fuse terminal
• 1x Fuse 30A
• 530g PETG black filament 
• 0,5m FILAFLEX 60A 
• 8x screw M3 x 30mm Allen head
• 4x screw M3 x 15mm Allen head
• some wires 1,5mm2 + 0,5mm2