TomT said:
Actually, it rarely gets cold enough in any of those places to even trigger the battery heater...
hill said:
have you heard of Mamouth? Mount Baldy? Lake Arrowhead? Shasta? Redding? South Lake Tahoe? Heck even death valley's record low temp was 15 degrees
... ok ... I'll stop now. I'd definately want the battery low temp package.
Having spent a night in Tahoe Donner where the overnight temp nearby went down to -37F and the -20F windshield washer fluid in my car's reservoir turned to slush, I would respectfully disagree that temps around Lake Tahoe rarely get cold enough to trigger the battery heater. Indeed, the all-time low for California, -45F, was at Wishon (or maybe Boca) Reservoir, just NE of Truckee. In winter, temps below zero (or -4F for that matter) are fairly common; the record low at the Lake itself is -29F. And Mammoth also gets down pretty low, as all that cold air pours down the slope of the Sierra. Probably not as low as Lee Vining Canyon (which is well known for its ice climbing), but plenty cold, although official temps of -4 and below are much rarer than Tahoe.