No I moved from Reno years ago but didnt change my location on SS. I live up in the mountains above Ely, NV. Ely is at 6,000 feet. Im higher and its colder. Usually we see -20s but occassionaly -30s and -40s. Thats not including windchill factor. Either way its to ****ed cold to try and start a vehicle thats been outside all night in that weather! I wont use the battery warmers unless it drops below 32 degrees. I will use eveything else though if its a cold night. I will also be wrapping may batteries in an insulating blanket and have the warmers undernieth to warm the entire battery. I think I have all the bases covered.