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Posted by Steve Wolf on August 8, 2007, 6:13 pm


I appreciate your suggestion about Garmin-supplied support but I asked
the question here to find a Garmin user.

Garmin is a good source. If I were looking for the information that
source could give, I'd contact that source. Alternatively, and why the
question is asked here, there may be someone with a unit in their car,
connected to power 24/7 and who removes it occasionally to put take it
on a trip or put it in a rental. I'll wait for that person.

Thanks, though. I'm in a user group looking for a user.

Steve


Unquestionably Confused wrote:
> Steve Wolf, wrote the following at or about 8/8/2007 3:17 PM:
>> Let me ask the same question in another way to elicit a different
>> response.
> [snip]
>> I'm not really interesting in guesses. I'm not concerned about theft
>> or other ancillary issues. All I need to know is if Garmin made the
>> charging circuit in such a way as to prohibit battery overcharge and
>> damage.
>
> If you're not interested in guesses, may I suggest you ask the experts -
> Garmin
>
> Here's the link for support.
>
>
> http://www.garmin.com/garmin/cms/site/us/supportcontacts
>
> You can spend the time on hold reading the owner's manual which won't
> answer your question other than to tell you that heat is harmful to the
> lithium-ion cells or you can just log-in and e-mail them and ask the
> question of the experts.
>
>
>

Posted by Phil Hornby on August 8, 2007, 6:26 pm


> Let me ask the same question in another way to elicit a different
> response.
> Will a Nuvi overcharge and damage the battery if left plugged in all the
> time? Is the answer to this question model dependent?
> One person worried about it getting overheated. Was that person concerned
> about it overheating because of being plugged in? I'm not interested in
> it overheating if left in the sun, I can guard against that.
> I'm not really interesting in guesses. I'm not concerned about theft or
> other ancillary issues. All I need to know is if Garmin made the charging
> circuit in such a way as to prohibit battery overcharge and damage.
> Steve

My Nüvi 310 sits on a cradle next to my PC, ( when it's not on the cradle in
the car). This cradle has a USB connection to its charging port, and so is
supplied with power 24x7. The Nüvi itself is normally powered off (because I
don't know if LCD displays have a finite lifespan). It appears to go into a
trickle-charge mode and normally says "Battery Charging Complete" (very
dimly).
The Nüvi 310 diagnostics seem to know the exact state of the battery
(charging current, capacity remaining, charging cycles completed etc), so it
appears to have a reasonably sophisticated charging circuit.

None of this represents knowledge of course, just observation...



Posted by Steve Wolf on August 8, 2007, 6:45 pm


And that answers the question! At least for that Nuvi. My older Garmin
and my new Forerunner 305 seem to have made the same allowances for
proper battery maintenance. It appear true across the line.

Thanks!

Phil Hornby wrote:

> My Nüvi 310 sits on a cradle next to my PC, ( when it's not on the cradle in
> the car). This cradle has a USB connection to its charging port, and so is
> supplied with power 24x7. The Nüvi itself is normally powered off (because I
> don't know if LCD displays have a finite lifespan). It appears to go into a
> trickle-charge mode and normally says "Battery Charging Complete" (very
> dimly).
> The Nüvi 310 diagnostics seem to know the exact state of the battery
> (charging current, capacity remaining, charging cycles completed etc), so it
> appears to have a reasonably sophisticated charging circuit.

Posted by Joel on August 8, 2007, 2:23 pm



> Is it OK to leave my Nuvi 350 plugged in all the time in the car 12V.
> cigarrete lighter? Will it damage the battery?
>
> Thanks,
> mac

        I don't think it will make much or any difference than plug-in whenever
you start your car. Cuz when you turn off the car the cigar-liter will have
no voltage.

        The only problem that it may get stolen or the heat of sweatty sumer
months.


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