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Old May 31st 20, 03:15 PM posted to rec.aviation.soaring
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Default K2 battery endurance

On Saturday, May 30, 2020 at 5:47:01 PM UTC-4, kinsell wrote:
Testing is always good, but John has a very reasonable suspicion the
problem was due to cold soaking the batteries. LFP's really don't like
the cold, and can even be damaged if charged below freezing. Maybe he
had a temporary loss of capacity that wouldn't show up under room temp
testing.


LFPs don't like to be charged while cold (below the freezing point of water is the rule of thumb, even though they are not made of water). But they discharge just fine while (reasonably) cold. Their capacity while cold doesn't suffer anything like the way SLAs capacity does.