it's easier to bring the
it's easier to bring the battery within temperature range in an hybrid than in a BEV. just use the wasted heat from the ICE engine. of course for very short drive it might be an issue. if warming up the battery makes the engine slower to get to temperature, then it's not worth generating more emissions, lower fuel economy. warming the battery with excess heat should start only when engine is hot. if the battery has a reduced range because of the cold but can still deliver power then it makes more sense to use as much electric power as possible from the battery, which will also bring it up to temperature, and having lower load on the ICE as long as it's cold and then start recharging the battery when ICE has reached it's optimum temperature. about li ion, my 500e sure has much less range in the winter, but cabin can be warmed up right when it's started and 100% of the power is available unlike ICEs