Originally Posted by
DaveLeeNC
Thanks. The documentation that I have read indicates that such things are doable. But this usage seemed (from all that I read in various places) so 'out of the norm' that I wondered if it was really workable. Sounds like yes.
It has also occurred to me that a backup, given that this particular usage is strictly training rides, is to just stuff my TomTom into the back of my jersey. It weighs a tad less than a pound - cheap insurance.
dave
Personally, I think it's way overkill to carry another device with you other than a Garmin, if you have one. A single charge will easily get you enough battery life for a century and then some and once the battery will no longer hold a charge (which takes years), replacing it is as simple as ordering a battery kit, which comes with the battery and the screwdriver you need to do the work. I bought mine in 2008 and just replaced the battery in 2013.
I never carry anything else with me on rides and the only time I would have ever needed anything was last year when my battery conked out. But I knew it was getting toward the end of its life, so that wasn't a surprise.