This is something that can be done manually, but for the 768 lithium iron phosphate (LFP) cells that were obtained for this project that’d be quite the tedious task. Hence it was decided to instead spend that time designing a system to automate this process, capable of charging, discharging, measuring and quantifying individual cells. Fortunately the issues on the PCB that are described in the video are claimed to be fixed in the repository version. Using five of these dual-cell cell testers it was possible to run through the hundreds of cells with ten cells at a time. As of publication of the video the testing was still in progress, which gives some idea of how long it takes to work through those cells.