Everyone who has a power adapter on your bike (i.e. powerlet cigarette lighter) how long of a wire lead did you need? I am trying to order one right now but am unsure. And did you add it in by the battery or off the headlight, or something else? Just need to power a GPS or charge a phone. Other than that, I have 65w bulbs. So between the two, I am still not stressing the electrical system too much.