Based on what I can find on eBay, these spotlights seem to be the earliest common car accessories to use the cigarette lighter socket. The plugs vary a lot in looks, but they're all generally a ...

If you have a USB extender (plug on one end, socket on the other) that's the best choice, as you won't ruin your dock connector. If not, okay, we can still make it work.

It’s all about the amperage. This situation is all to do with amperage. USB ports at home, such as those of a wall plug or on the side of your laptop, tend to have an output of 2.1A or 2.4A.