I am starting to see the Turtle light more frequently in my car. As my battery warranty is up soon, if there is an issue with a cell or cells, I would like to have the issue addressed sooner rather than later.
The linked video shows a recent occurrence. What caused me to shoot this video is that I was cruising at a constant 104 km/h with the power meter needle just out of the ECO range (at the border between green and white shading) with the Turtle light on constantly. The battery was nearly full, but had been cold-soaked from the previous night with an overnight low of approximately -20C. Temperatures at the time were -2C. The occurrence was noted approximately 15 minutes into a drive. I shot the video immediately afterward and had to accelerate to induce Turtle.
I ran the battery down to empty and noted a 0.25V difference between highest and lowest cell when sitting still in my driveway. Differences of greater than 0.3V could be produced while driving. There are approximately 6 cells that are showing weakest with #19 consistently low. Cell temperatures by the time the battery was empty ranged from +4 to +11C.
For the experts in this group:
1) Is what I am seeing normal for a cold pack?
2) Do I indeed have weak cells?
3) Has anyone been successful with warranty replacement under these circumstances?