Cold temperatures make them less efficient, and they can be damaged charging below freezing so need to warm up first. Cold itself does not accelerate battery degradation.
As for longevity my understanding is higher temperatures are the damaging factor, as well as leaving the batteries for prolonged periods at very low or high states of charge - current 'wisdom' is keep the battery between 20-80% nominal and degradation will be glacial.
There's a Finnish Model S taxi* that is now well over 250,000 miles with 93% initial range remaining, and a huge number of Priuses and Amperas well over 100k miles with no significant reports of battery loss - both have large chunks of unused battery capacity top and bottom and Amperas also have liquid thermal management to prevent overheating.
My B250e would only use 77% of nominal battery capacity for a regular 'full charge'.
* www.teslarati.com/tesla-model-s-400k-km-250k-mi-7-percent-battery-degradation/
p.s. Teslarati is a sickening fanboy Tesla/Elon Musk site as only the Yanks can manage, but this report is well known.
Last edited by: Lygonos on Mon 12 Aug 19 at 22:27
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