Chevy colorado fender flares oemAnswer: What you are proposing 4 banks of 20 18650s amounts to carryinga nuclear bomb round in the car. The other more immediate problem you have is that 4s=16v (ish) sooooo your car at 12v won't be able to pull the batteries up to 16v unassisted - you'll need a boost converter to get the extra 4...Undertale bits and pieces charaAug 12, 2020 · The Mixed configuration of connecting the 18650 batteries means that first some batteries are connected in one type of connection. After connecting them separately, they are connected. This creates a serial-parallel or a parallel-serial connection.