How does one determine the C rate of an aged cell?
I would like to find the discharge rate just before any cliff edge of capacity loss. Can the C rate of a cell be estimated by the cells rated heat dissipation and measured internal resistance? Where I could find the current that will use up all the cells heat dissipation capacity.
I have a number of recycled laptop battery 18650 cells.
Are there any negative effects of the cells being below room temperature?