Years ago, especially before sealed, maintenance-free car batteries, most vehicle owners were more diligent about checking the battery and charging system because they feared a frozen battery.

Electric vehicle owners are discovering the harsh reality of driving a battery-powered vehicle in ... owners couldn't even get into their frozen cars. Tesla CEO Elon Musk last week promised ...

First, don’t let the battery get too low—make sure you always have a 20 percent charge or so. If you want to power up in subzero temperatures, the car may need that reserve to warm the battery ...