Test cell is Molicel P42A. And the outside temperature was -26C. Internal resistance increases on the cold. So the voltage drop is much higher on cold battery. I think that 10A was almost max current that I could drain from the battery, because the voltage drop was so high. And its interesting how the voltage rose from 2.90V to 3.40V because it warmed up.
Li-ion batteries on freezing temperatures. Experiment
- Thread starter Jacka98
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Its working fine. Only thing that I don't like is that it doesn't have remote voltage sensing. At higher currents there is some voltage drop so the real capacity is little higher, because the tester thinks that the battery is already empty. But doesn't matter that much if you are going to do comparisons between batteries.
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