I downloaded Doug's graphical log parser below which is fantastic: TeslaFlux Here's the archived thread where I stumbled across the lowest brick feature: Ideal range gradually dropping off [Archive] - Tesla Motors Club - Enthusiasts & Owners Forum Lots of good information to take better care of your roadster and battery life. Cool seeing your driving and charging habits graphed so you can get a clearer picture on things. There's one feature I'm trying to understand on reading the data which I find very useful, its the "Lowest Brick" output. It appears to be a series of numbers that read from left to right light a paragraph. From what I read you want these numbers to randomly change and I believe not continue for all that long. I also believe you don't want the same number that repeats across the line to keep repeating daily or not being random anymore. My question is does anyone know how to officially read and interpret this data? I see 2 or even 3 sets of numbers the continue for a few lines. This was on a single day sample. But I can see those same numbers repeat earlier. I have logs back from when the car was built to now so I can compare how the pack's health was back then. If possible can someone who has knowledge on this please explain how I should be using this data and feature? I do find it useful if I know how to properly read it. I think its purpose is to find a bad brick that has a cell going bad which can't sustain the voltage of the other cells hence pulling down the other cells to the weakest cell's voltage. Thanks!