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After the first cold tests I decided to go a step further and do some tests with even colder temperatures to see the behavior of the cells.
For the Orange tests the cell was padded this way:
Side view with padding on the sides removed:
These tests are interesting for people like me that uses lithium ion cells in cold climates. Especially in my case, I use the cells in an electric bicycle. It’s important to have some sort of thermal insulation on the battery when riding in cold temperatures, the performance improves dramatically and the battery cycle life is preserved.