How much do those magnetic heater deals usually cost and do they just plug into a normal wall outlet?
I also have a question on pluging my truck in. I car pool with my aunt to work and we take turns driving every other day and the way I have been doin it is pluging in the block heater which is on a timer set to come on 3 hours before I leave and plug it into the truck the night before I drive. The temps for were I live are predicting highs in the teens and lows in the low single digits, im a little concerned about it on that night and day were it just sits outside not pluged in or anything. My question is when its really cold like this should I just leave it pluged in all the time and give my parents a few extra bucks for the extra electricity or is leaving it on the timer alright, or should I mabey bump the time up to 4 or 5 hours before I leave in the morning?