The difference is that your phone does not have thermal management for its battery, other than passive cooling. EV batteries, on the other hand, do actively man

The difference is that your phone does not have thermal management for its battery, other than passive cooling. EV batteries, on the other hand, do actively manage their temperature; even a parked EV might, if the environment is too cold, use up a bit of its stored power to heat up the battery to keep it in the correct temperature range.