There are times that I wished I had a flashlight in my car: to scope house numbers in a dark street or to look at something underneath a seat, among other things. The idea of having a flashlight that plugs into the car’s cigarette lighter is cool – even if you leave it for a while, charging it is easy. Granted, it takes three hours to get a full charge (that lasts for one hour of use), but first, you don’t always need a full charge. Secondly it is better than going home or to a store to get batteries. $15 at weiguosolutions.