So this was from an independent source
Our analysis shows the ideal operating temperature to get the most range out of your EV is 21.5 C (70 F). At this temperature, EVs are achieving on average 115% of their rated range. The farther above or below the optimal temperature, the more range is lost.
<p style=”text-align: left;”>It would be useful to have an estimated drop off – % battery to temperature – I will continue looking for an independent trusted source with chart.</p>