The 35E is a much better cell for this use case because of its higher capacity. When these battery packs are limited to ~30A output by the internal fuse and maybe 20-25A max from the speed controller, there is no need for high output cells.Thank you for the info. I looked it up and by my reckoning, when new, that cell is preferable to Samsung 35E !
However, that doesn't say anything about aging.
The report suggests uneven quality control, but it is a Korean cell. Perhaps when sold from China in packs they did poor welding and such?
Here's a more in-depth review of some parameters https://www.candlepowerforums.com/v...-Test-review-of-LG-18650-M26-2600mAh-(Purple)
Remember, there are 4-5 sets of cells in parallel so each set only needs to output 7.5A max before the fuse blows, and in practice the speed controller's amperage limit means each set only needs to output ~6A.