Most touring bikes, and many scooters have a cigarette lighter attachment point. My SH300 has one in the glove box. The 2016+ VFR800 has one. Etc.
Many better quality gloves have conductive tips on their forefingers for capacitive touchscreen usage these days. My Alpinestars SP8 gloves do.
I find Google Maps audio directions just barely acceptable for London navigation. I prefer my Garmin Zumo, but only use that if my destination is a long way off the big city-crossing roads I otherwise know reasonably well.
It comes with my when I have planned routes, rather than destinations, though. Google Maps is dreadful for planning a route with waypoints - it needs constant interaction at every stage.