It was on a forum here where this function (warming) was mentioned. If I understood it correctly the jump function doesn't transfer power from the 12v to the HV battery but merely warms the HV battery, thereby allowing it to deliver more energy for starting purposes. I was inquiring not about using the function as a last ditch effort to start a cold depleted HV battery but as a means of getting a cold battery warm ASAP to facilitate optimal FE. I'll look for that forum and give you a link to it if I can find it again.

Regards,
David