What comes to mind when you hear the term “car battery”? Fifteen years ago, the answer would have been quite obvious. But lately the idea of what a car battery entails has shifted away from that essential-but-oft-forgotten black box under the hood to state-of-the-art propulsion systems of the near future. When talking about batteries, we focus less on volts and more on kilowatt-hours and MPGe. We’ve mentioned batteries a lot lately, specifically in regards to the Chevrolet Bolt, GM’s potentially game-changing affordable all-electric vehicle. But when we talk about the Bolt’s 238 miles of battery range, how is that different from talking about the battery at the end of your jumper cables?