A power inverter turns your car into a rolling outlet. That’s useful when you travel, camp, work out of a truck, or ride out a storm with devices that still need juice. The risk is simple: bad power ...

Add Yahoo as a preferred source to see more of our stories on Google. A power inverter turns your car into a rolling outlet. That’s useful when you travel, camp, work out of a truck, or ride out a ...

Add Yahoo as a preferred source to see more of our stories on Google. These machines are pricier than more common, portable generators. But they run longer and quieter, and use less energy. By Paul ...