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  1. #1
    Senior Member Curbendo's Avatar
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    Garmin for double century?

    Hey all. I've been thinking about getting a Garmin, or some other GPS computer, but I'm concerned about battery life. I ride double centuries now and then, so I need something that I can be confidant will last 15-17 hours on a single charge (yeah, I'm slow). The unit I keep considering is the Edge Touring (I like the altimeter option and don't need the bells and whistles of the 810), but Garmin indicates it and other devices will last "up to 17 hours." Seems like a red flag to me, since I find specs usually err on the most optimistic/unrealistic side.

    I've seen people using GPS's on doubles before, but what are they using? Or are they just faster than me?

    Anybody have any thoughts or suggestions? Otherwise, I'll just stick with my little ol' CatEye.

  2. #2
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    That's cutting it pretty close. i don't know of any device that lasts that long on battery. The only thing would be to get an extra battery or two, if they are swappable. Or a dynamo hub and USB charger that runs off it.

  3. #3
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    I have a 500 that I have taken on doubles with no problems. Also I have an 800 that lasts quite a bit of time. Get a garmin you will enjoy it. By the way 15 hours on a double is not slow you just need to draft more

  4. #4
    Zoom zoom zoom zoom bonk znomit's Avatar
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    You should get through a double on a new garmin but as with any Li Ion battery its get weaker every year.
    A portable recharge pack helps if you're stopping for any reasonable length of time you can hook it up, charges around 1% per minute (I've done 24hr rides on my edge 500).

    Otherwise the Etrex 20 or 30 is a good solution, around about 25 hrs off 2AA and they have maps.

  5. #5
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    Many people use these for rides longer than 200 miles. Use a recharger with a battery. You can use them while they are being charged (while you are riding). You might want to avoid charging it in the rain.
    Last edited by njkayaker; 01-12-14 at 07:53 PM.

  6. #6
    Senior Member Looigi's Avatar
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    You might consider using an auxiliary supply, like the Gomadic AA battery unit for ~$20, which allows the edge to operate while drawing power from it. http://www.gomadic.com/garmin-edge-5...-extender.html
    Ride more. Fret less.

  7. #7
    Randomhead
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    I wouldn't expect to make it through a double with a single charge. I think most people get through about 13 hours or so fairly reliably. I got a gomadic. I finally got some eneloops to put in it, but then I didn't need to use it on yesterday's 200k. I guess I should figure out a way to strap it to my top tube

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    Senior Member rebel1916's Avatar
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    The triathlon focused 310xt advertises a 20 hour battery life and is reasonably priced. It can be worn as a watch or mounted on the bars.

  9. #9
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    Quote Originally Posted by rebel1916 View Post
    The triathlon focused 310xt advertises a 20 hour battery life and is reasonably priced. It can be worn as a watch or mounted on the bars.
    No maps. The OP is talking about the Edge Touring, which has maps. From that, one would think the OP wants something with maps.

  10. #10
    Senior Member brianmcg123's Avatar
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    Just to put in my $.02.

    I have a Garmin 500. I put in about 6-7 hours of riding a week. When I plug in my Garmin to upload my rides around once a week-ish its still showing over 95% charged.

    I have never seen it below 90%.

    Once I plug it in its back up to 100% in about 20 minutes.

    I may do a test and see how long I can go before it runs out.
    Everyone's a roadie, they just might not know it yet.

  11. #11
    Rod & Judy gracehowler's Avatar
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    My 705 Garmin easily did that when new, now at 3 years, 12-13 hours, yes, needs a new battery. I have heard the 810 doesn't quite have the same battery life though?
    R

  12. #12
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    Quote Originally Posted by brianmcg123 View Post
    Just to put in my $.02.

    I have a Garmin 500. I put in about 6-7 hours of riding a week. When I plug in my Garmin to upload my rides around once a week-ish its still showing over 95% charged.

    I have never seen it below 90%.

    Once I plug it in its back up to 100% in about 20 minutes.

    I may do a test and see how long I can go before it runs out.
    Garmin says "up to 18 hours".

    60-140 hours isn't likely unless you have one of the rare nuclear power ones.

    It's more likely that the battery usage measurement is off. For some devices, a close-to 100% draw-down of the battery is required to calibrate the usage measurement.
    Last edited by njkayaker; 01-13-14 at 07:05 PM.

  13. #13
    Zoom zoom zoom zoom bonk znomit's Avatar
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    To add, I've used my edge 500 for temperature monitoring. Turn off the GPS receiver and I get 25 hours…

  14. #14
    Senior Member rebel1916's Avatar
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    Quote Originally Posted by znomit View Post
    To add, I've used my edge 500 for temperature monitoring. Turn off the GPS receiver and I get 25 hours…
    But that is useless for cycling.

  15. #15
    Zoom zoom zoom zoom bonk znomit's Avatar
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    Quote Originally Posted by rebel1916 View Post
    But that is useless for cycling.
    Not if you have a speed/cadence sensor!

  16. #16
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    I did three double centuries with a 800, it survived to the end (~15:00) during one and shut down at 15:40 and 16:00 during the other two. It may last longer if you minimize poking at the screen and turn down backlight.

  17. #17
    Senior Member rebel1916's Avatar
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    Quote Originally Posted by znomit View Post
    Not if you have a speed/cadence sensor!
    Touche. Let me correct myself. Using a Garmin to inform you that it is hot or cold is overkill, to the point of being slightly cray cray (as the kids say), even if it will provide that info for as long as 25 hours.

  18. #18
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    Quote Originally Posted by znomit View Post
    Not if you have a speed/cadence sensor!
    I hpoe you are talking about cadence/speed profiles, which are nice but not that useful (during the ride).

    If not, you can get 6+ months and get heart rate, altitude, temperature, cadence, and speed max/ave from a cyclecomputer. (There is not much point in turning off the GPS and the 500 doesn't have maps, like the OP is talking about.)
    Last edited by njkayaker; 01-13-14 at 09:28 PM.

  19. #19
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    Quote Originally Posted by hamster View Post
    I did three double centuries with a 800, it survived to the end (~15:00) during one and shut down at 15:40 and 16:00 during the other two. It may last longer if you minimize poking at the screen and turn down backlight.
    This indicates that a battery charger is necessary.
    Last edited by njkayaker; 01-13-14 at 09:32 PM.

  20. #20
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    Quote Originally Posted by njkayaker View Post
    ... and the 500 doesn't have maps ...
    /Offtopic: Correct, the 500 does not have street maps, but it does have courses, which are handy for staying on a planned route in unfamiliar territory. Trace the route at ridewithpgs.com (or your other favored site), export from there to a .tcx file on your computer, use USB to transfer that file to the "/Garmin/NewFiles" folder on the 500, and you have a map of the route ready for dynamic use during the ride.

  21. #21
    Senior Member JimF22003's Avatar
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    Reminder, that following a route, and staying on the map display page sucks down the battery faster.
    2009 Cervelo R3SL TdF Edition, Ultegra Di2
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  22. #22
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    Quote Originally Posted by njkayaker View Post
    This indicates that a battery charger is necessary.
    I was thinking more along the lines of a higher fitness level, but that works too.

  23. #23
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    Quote Originally Posted by Athens80 View Post
    /Offtopic: Correct, the 500 does not have street maps, but it does have courses, which are handy for staying on a planned route in unfamiliar territory. Trace the route at ridewithpgs.com (or your other favored site), export from there to a .tcx file on your computer, use USB to transfer that file to the "/Garmin/NewFiles" folder on the 500, and you have a map of the route ready for dynamic use during the ride.
    Yes, it does do that. Maps are better. The OP was talking about the Edge Touring, which has maps.

  24. #24
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    Quote Originally Posted by hamster View Post
    I was thinking more along the lines of a higher fitness level, but that works too.
    That didn't work that well for you. It's still cutting it close.

  25. #25
    Senior Member JonnyHK's Avatar
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    I've had my Garmin 500 last 16 hours for a 250km event (ride time and rests). It is possible even if it is potentially cutting it fine.

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