The best sat nav will keep you right on your way home for Christmas. We've rounded up some of the most popular standalone sat navs and sat nav apps.
Which? looks at the best free Windows phone sat nav apps, including Waze, Here Drive+, Wisepilot and a paid-for alternative, Co-Pilot.
How long will your sat nav battery last? Which? took to the road to see which sat nav has the best battery life. Read on for the results.