The answer is a little easier for the PowerJolt car charger—it jumped $5 in price from its 2008 iPhone predecessor while preserving the old industrial designs for both its cable and cigarette lighter adapter, but there isn’t yet a less expensive option if you want high-speed iPad charging in your car. Kensington already offers a same-priced, similarly-named PowerBolt Micro Car Charger, which is roughly half the size of PowerJolt—small…