Wish there was a sympathy button instead of only the like button. You should be fine with the car charger and a bunch of liquid. Worst case, use the remaining X2 as a passthrough until it charges. Maybe get a "Y" cable for the cigarette lighter socket so you can charge more than one at a time as a little extra insurance.
Where do you buy a Y cable at? We have Best Buy and Walmart in Carson City as well as Staples and Office Depot.
I never forget to turn it off...