[kccqzy]

Yes that's absolutely the case. So it just depends on how good the cooling system is. For a phone, it has no active cooling system. For an electric vehicle, almost all manufacturers (except Nissan Leaf) have adopted active cooling and you can expect them to do a good job activating adequate cooling for the battery.

[ssl-3]

In absolute terms, cooler isn't always better.

For example, Tesla has a pre-heat function for their cars' batteries that can be used prior to charging.

https://www.tesla.com/ownersmanual/model3/en_us/GUID-F907200...

[kccqzy]

That affects charging speed, not battery longevity.

[VygmraMGVl]

It can affect battery longevity. If you charge lithium ion at cold enough temperatures, you get lithium plating which rapidly degrades capacity and can lead to internal shorts and fires.