does the pre heating system drain the battery in the cold

[harber33]

Hi I have the RR Vogue Auto Biog on a 2005 plate, I have trouble with the battery and starting in the mornings, the battery is only 9 months old and charges fine when the RR has been running for a while, does anyone know if the pre heating system drains the battery?

I have the Pre Heating, pre set for 30 mins prior to going into the RR in the morning?

Help?

Thanks