Doug et al,
I did some tinkering yesterday with how I use my Garmin Forerunner 405 when driving. I think I found something would sharing.
1. I changed the setting on my Garmin, to have it record the location every second. The default has it computing when to record the location based on some (unknown) algorithm. Recording every second increases accuracy, but cuts battery life to 1/3 (not by 1/3 – to 1/3), from about 9 hours to about 3.
2. I brought along the charging adapter and a USB cable, and attached it to a cigarette adapter that has a USB port on it. That let the Garmin keep right on charging while in use, and off-set the accelerated battery consumption. Not an issue for short drives, as in under 3 hours, but really, in life, good drives take a hell of a lot longer than 3 hours.
I’ve attached a Google Earth file, here. It shows the difference in accuracy for the different recording methods for the Garmin Forerunner 305. Like night and day, as I see it.
I’m tinkering with this because I’m getting ready to go to the US and to be reunited with my Mini. Tess Turbo and I will be celebrating our reunion by driving from Baltimore to Ft. Leavenworth, and then on to Augusta, GA, a week later. That’s a lot of miles. And while in GA, I expect to be making some trips up to Deals Gap to run the Tail of the Dragon with other Minis. While I’d probably be OK with the less accurate, longer battery lasting default setting for the long haul drives, it’ll be nice to have really accurate recordings for the Dragon and other sporty drives. Battery life was always the issue; I think this solves that, and for not a lot of money.
You should be able to find USB adapters for your cigarette lighter at Radio Shack or at Amazon (an example is here).
