Hello guyz, could you please help me with one delicate question? The thing is, I have been developing a device, which has quite a miniature size and it operates from a 12v battery, which needs to be charged occasionally. I tried to find a suitable receptacle. Since ordinary circular are too big I thought about using something like micro USB. Works fine and the size is very small. But the idea is, I am afraid that some silly user may plug it in to his computer and burn everything. So is there any connector and a receptacle on the Earth, which is not bigger, than a micro USB, but is not micro USB?