Is it still recommended to use seat heaters instead of heat in 2021+ Model 3s?

[SylvainG]

Anyone noticed that once the battery is warm, it will stay warm for several hours? Like today, I did about 70km in rides that started mid morning and came back home around 1:30pm. Took the car at 5pm without preheating and still had regenerative braking, although it was still -4C outside (was -15C in the morning).

 

[GtiMart]

Yep, the battery is a big mass, it takes a long time to cool down. Similarly, it takes a while to heat

 

[SylvainG]

Indeed but it takes less than 30 minutes to warm up but several hours to cool down.