2006 Go Mango Charger in the Snow!

This Massachusetts Winter has been extremely icy. Naturally, like every year, I keep my Dodge Charger Daytona R/T "Go ManGo" off the salty and pot hole riddled streets as much as possible. The Charger stays in the garage! However, it seems not cranking, and driving it for a while takes its toll on the the battery when it is this cold. I had to use the jumper cables to get the car to start a couple of times this winter already. The battery was completely dead.
Luckily, the Charger's battery is located in the trunk, so jump starting it is not a big problem. I just pull my Dodge Ram truck close to the garage, open the trunk, and hook it up. It takes a few minutes of idling the truck, but after a few tries, the Charger, so far, has always come back to live. Of course, the clock needs to be reset to the correct time, the radio stations need to be reprogrammed, and the compass needs to recalibrate itself (it always throws a SW-Cal, or NE-Cal code, depending on which direction I first take off). I'll be glad when spring returns - hopefully soon.