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-   -   Garmin for double century? (http://www.bikeforums.net/electronics-lighting-gadgets/929614-garmin-double-century.html)

Curbendo 01-12-14 06:26 PM

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.

zacster 01-12-14 07:05 PM

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.

longslow 01-12-14 07:30 PM

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

znomit 01-12-14 08:20 PM

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.

njkayaker 01-12-14 08:50 PM

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.

Looigi 01-13-14 10:06 AM

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

unterhausen 01-13-14 11:28 AM

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

rebel1916 01-13-14 01:25 PM

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.

njkayaker 01-13-14 06:51 PM

Quote:

Originally Posted by rebel1916 (Post 16407426)
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.

brianmcg123 01-13-14 06:58 PM

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.

gracehowler 01-13-14 07:47 PM

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

njkayaker 01-13-14 07:57 PM

Quote:

Originally Posted by brianmcg123 (Post 16408428)
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.

znomit 01-13-14 08:44 PM

To add, I've used my edge 500 for temperature monitoring. Turn off the GPS receiver and I get 25 hours…

rebel1916 01-13-14 09:03 PM

Quote:

Originally Posted by znomit (Post 16408691)
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.

znomit 01-13-14 09:12 PM

Quote:

Originally Posted by rebel1916 (Post 16408727)
But that is useless for cycling.

Not if you have a speed/cadence sensor!

hamster 01-13-14 09:15 PM

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.

rebel1916 01-13-14 09:18 PM

Quote:

Originally Posted by znomit (Post 16408747)
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.

njkayaker 01-13-14 10:24 PM

Quote:

Originally Posted by znomit (Post 16408747)
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.)

njkayaker 01-13-14 10:26 PM

Quote:

Originally Posted by hamster (Post 16408753)
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.

Athens80 01-14-14 06:01 AM

Quote:

Originally Posted by njkayaker (Post 16408919)
... 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.

JimF22003 01-14-14 06:02 AM

Reminder, that following a route, and staying on the map display page sucks down the battery faster.

hamster 01-14-14 06:46 AM

Quote:

Originally Posted by njkayaker (Post 16408922)
This indicates that a battery charger is necessary.

I was thinking more along the lines of a higher fitness level, but that works too.

njkayaker 01-14-14 07:34 AM

Quote:

Originally Posted by Athens80 (Post 16409331)
/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.

njkayaker 01-14-14 07:38 AM

Quote:

Originally Posted by hamster (Post 16409384)
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.

JonnyHK 01-14-14 08:25 AM

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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