I have some Toshiba SCiB cells that I wish to string in 4s configuration. These are Lithium Titanate (LTO) cells. They have a 20Ah capacity and operate safely between 1.5 V and 2.7 V. The cells were obtained after some light use. I was told they still have good capacity and should still have a solid amount of cycles left.
I have 14 cells and I want to know how to determine which four cells will perform the best when strung together. I could just grab four cells and place them in series ( with appropriate cell managing of course). Would it be worth it to measure the internal resistance of each cell and place in series the four cells with the most similar internal resistance?