In car heater

[Bailey93]

I wonder if such a heater exists....

Battery operated either with replaceable/rechargeable batteries, or plug in to charge a built In battery unit.

Remote operated / app operated

So basically I can have said heater sat in the car, in the morning I can lean out of the door press a button, heater switches on I faff about eating/brushing teeth etc etc and come out to a toastie car.

Probably wishful thinking