One time in Saskatchewan, I had to turn back when I realized I would not make my destination, due to the cold. The winter storm that buried my car the day before was still blowing arcticly, so I had been carefully watching my mileage. EV batteries must keep themselves warm, and regenerative braking is less efficient in cold weather. I still should have been fine, but the rural washboard road turned to mush in a sleet storm. (At the time, I didn’t know that my front struts were broken, thus causing friction on the insides of the front tires on bumpy roads). My range was dropping considerably faster than my miles passed, even as I slowed to a crawl.

So, I turned around and headed back—while still in range—to a charger I’d used recently. And then I took the long way around. I no longer have range anxiety; I have contingencies.

“It may be taken for granted that, rash as the Americans are, when they are prudent there is good reason for it.”

— by Jules Verne in Around the World in 80 Days

This was a wake up call that my battery just doesn’t have the range it did when I started four years ago. Let’s face it, using up to six superchargers a day while crossing the continent repeatedly isn’t common use. Ever since I drove through clouds of locusts on a hot day in eastern Oregon, I’ve noticed the car struggles with heat. (I’ll have to get my radiator checked more thoroughly, too). And I’ve driven through all four major deserts in the contiguous US many times, including getting stuck in traffic south of Vegas mid-day in the summer. Extreme cold requires extra energy and slows charging, but it’s extreme heat that damages batteries in the long run.

For most folks, the decline in battery range wouldn’t matter, as it’s not quite bad enough to be covered under warranty. My Tesla 3LR can still drive further than most EVs (or RVs). But I’m going to the Yucatán, and there’s a gap in the supercharger network in Tabasco. So I need every mile of long range.

While supercharging on Route 66 above and consulting with Tow Mater—“average intelligence”—, I decided to get a new high voltage battery. TSK (TeslaService.LA) gave me a good price on a lightly used battery. Turns out that since most folks treat their batteries much better than I do, the collision repair shop has plenty of used high voltage batteries in stock. They did a great job, including a thorough cleaning and minor fixes, so, next stop, Mexico!