Lasting up to 5 hours in training mode and up to five weeks in power-save mode, the Forerunner 10 can be worn as a day- to-day timepiece, so you'll always be ready to hit the road, track or trail.

ENGADGET: Garmin Forerunner 10 is a GPS watch designed for outdoor fitness, we go hands-on

Once the car is parked, the app will automatically save its position and switch into pedestrian mode to provide walking directions.

ENGADGET: Garmin, Navigon GPS apps now consider mass transit, remember where we parked

Eco mode slows the throttle and dampens the AC to save fuel but is noticeably more sluggish than the sport or even the normal settings.

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