It was always a faff to get the USB power adapter for my satnav to work in the cigarette lighter socket in my dashboard, and now it no longer appears to work at all. I'll check the fuse box, but...

Ideally, I'd like to splice a powered USB hub directly into the car's power supply somewhere. If I can find one slim enough, I can mount it under the empeg, which is currently in a 1.5-DIN slot.

Any tips on how to go about doing that?