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Normal AC charging a 1490T

 

I am a bit confused by the charging of my 1490 using an ac adapter (for my cell phone) that I used to charge my StreetPilot c340.

I would like to know if what I am seeing is "normal," or do I need to buy a special (Garmin) AC charger?

With the 1490 off, I plug in the charger. The GPS looks like it is going to mass storage mode, like it is attached to a computer. But about 30 seconds later, it discovers there is no computer, and the unit boots up and is in normal operating mode. If I then turn the unit off, it presents a message that the battery is charging, and then the screen goes black. I don't have any way to tell when it is done charging. But when I unplug it and turn it on several hours later, the battery has indeed recharged.

I read the manual, but it is a bit sparse in detail as to all this, only letting me know that the unit can be recharged with an AC adapter.

Thanks!

--
Ted in Ohio, c340, 1490T with lifetime maps

May work, but

While what you are doing may work, I would be concerned that the voltages were not exactly what was required.

Why not just use your USB cable to charge it from your computer?

I agree, voltage is probably

I agree, voltage is probably an issue. Either just plug in through the computer's USB port, or get an AC-to-Cigarette-Lighter adapter and use the car charger that came with the unit, but in the house.

1260T

tkessel wrote:

I am a bit confused by the charging of my 1490 using an ac adapter (for my cell phone) that I used to charge my StreetPilot c340.

I would like to know if what I am seeing is "normal," or do I need to buy a special (Garmin) AC charger?

With the 1490 off, I plug in the charger. The GPS looks like it is going to mass storage mode, like it is attached to a computer. But about 30 seconds later, it discovers there is no computer, and the unit boots up and is in normal operating mode. If I then turn the unit off, it presents a message that the battery is charging, and then the screen goes black. I don't have any way to tell when it is done charging. But when I unplug it and turn it on several hours later, the battery has indeed recharged.

I read the manual, but it is a bit sparse in detail as to all this, only letting me know that the unit can be recharged with an AC adapter.

Thanks!

My 1260T does the same.

Yes...

If you looked at the specs for both devices, one will have a slight deviation of volts. If you do the math over several hours the device will lack the charging power which will be evident in the slow charge.

milliamps, not volts

I think the issue has something to do with the output in milliamps. If the unit "sees" a lower amount of current (computer usb ports output 5vdc, 500ma) it goes into computer mode. At a higher current it goes into nav mode. Search this site and I'm sure you'll find a more detailed answer. I've seen this topic before but can't find a specific thread on it, though I know it's here somewhere.

--
Nuvi 2595LMT, Nuvi 1490T, Nuvi 260, GPSMAP 195

no, the charger is just fine

jgermann wrote:

While what you are doing may work, I would be concerned that the voltages were not exactly what was required.

Why not just use your USB cable to charge it from your computer?

mem10123 wrote:

I agree, voltage is probably an issue. Either just plug in through the computer's USB port, or get an AC-to-Cigarette-Lighter adapter and use the car charger that came with the unit, but in the house.

Naw, voltage and current is not an issue. USB voltage is 5 volts. While one might be able to find slight variances (in the millivolts) between devices, you could also find that difference between computer USB ports. Since the Garmin is designed to charge from any USB port it will also charge from a powered USB hub or from a cell phone charger that provides the same 5 volt level.

USB is also speced to supply 500ma (max) to the usb device, but this can be less depending on other power demands (an 8 port hub doesn't usually supply 500 ma on each of the 8 ports at the same time for example). It is not a function of current that determines if the nuvi goes into connected or nav mode, as speculated here, since mine goes into connected mode when powered directly from a laptop that can and does supply the full 500 ma @ 5v. It is a function of if the nuvi is talking to a computer or not (also evident because the original poster reports the nuvi at first tries to establish a computer link and then goes into nav mode).

In short the adapter that you are using is every bit as good as charging from a computer or from a much more expensive "official" Garmin device which may turn out to be exactly the same device but with Garmin's name on it. Why fire up a computer just to charge the nuvi when you have a lower power independent charger intended to charge devices? There would be no reason to expect the computer to be any closer to some imagined "ideal" value than the charger. If anything I would expect a device designed to charge to be closer to the idea.

had a Garmin AC charger and used it on my 760, 855, 885T & c550

I had a Garmin AC charger and used it on my 760, 855, 885T and c550 and had similar screens with mine that you are seeing. All sounds normal to me.

They all worked fine and the Garmin charger is specially wired to allow you to actually use the unit while charging. The USB cable and other chargers force the unit to go into mass storage mode when you plug them in.

--
nüvi® 3790LMT - Samsung Galaxy Note 8.0 with Garmin Viago Maps - GM Built-in Navigation system

No

allbizz wrote:

If you looked at the specs for both devices, one will have a slight deviation of volts. If you do the math over several hours the device will lack the charging power which will be evident in the slow charge.

If you look at the spec for any USB device it is going to be 5 volts, period. If you actually measure them it may varry by a millivolt or two but you couldn't accurately predict which would be lower. That does not matter anyway, since the nuvi has to regulate the voltage down to a lower charging voltage for the LiIon battery, it is designed to work just fine on any voltage that you would find on a USB port, slight differences in the output are not a factor.

There ya go

rjrsw wrote:

...the Garmin charger is specially wired to allow you to actually use the unit while charging.

--
Nuvi 2595LMT, Nuvi 1490T, Nuvi 260, GPSMAP 195

tkessel wrote: I am a bit

tkessel wrote:

I am a bit confused by the charging of my 1490 using an ac adapter (for my cell phone) that I used to charge my StreetPilot c340.

I would like to know if what I am seeing is "normal," or do I need to buy a special (Garmin) AC charger?

With the 1490 off, I plug in the charger. The GPS looks like it is going to mass storage mode, like it is attached to a computer. But about 30 seconds later, it discovers there is no computer, and the unit boots up and is in normal operating mode. If I then turn the unit off, it presents a message that the battery is charging, and then the screen goes black. I don't have any way to tell when it is done charging. But when I unplug it and turn it on several hours later, the battery has indeed recharged.

I read the manual, but it is a bit sparse in detail as to all this, only letting me know that the unit can be recharged with an AC adapter.

Thanks!

My nuvi 660 does that also! I wonder if the newer models give an indication when there charging/full.

--
Nuvi 660. Nuvi 40 Check out. www.houserentalsorlando.com Irish Saying. A man loves his sweetheart the most, his wife the best, but his mother the longest.

OK, so does my phone charger!

rocknicehunter wrote:
rjrsw wrote:

...the Garmin charger is specially wired to allow you to actually use the unit while charging.

Yes, and I can do that with the non-Garmin phone charger I am using. The only varient is that first it simulates "mass storage mode", then it comes on by itself, after about 30 seconds, and works fine.

--
Ted in Ohio, c340, 1490T with lifetime maps

Why not?

jgermann wrote:

While what you are doing may work, I would be concerned that the voltages were not exactly what was required.

Why not just use your USB cable to charge it from your computer?

Why not? Although my pc is on frequently, if I am travelling I won't have it with me. And I don't want to have to turn on my pc just to charge the Garmin.

Also, when in "mass storage mode" connected to my pc, the unit screen stays lit.

--
Ted in Ohio, c340, 1490T with lifetime maps

But my charger doesn't quite do that!

rjrsw wrote:

I had a Garmin AC charger and used it on my 760, 855, 885T and c550 and had similar screens with mine that you are seeing. All sounds normal to me.

They all worked fine and the Garmin charger is specially wired to allow you to actually use the unit while charging. The USB cable and other chargers force the unit to go into mass storage mode when you plug them in.

My phone charger makes the gps start by "simulating" mass storage mode (that is what the screen looks like), then the gps turns on, then I can either use it, or turn it off, and it displays a screen saying it's charging. That screen quickly goes off, while the unit charges.

--
Ted in Ohio, c340, 1490T with lifetime maps

Just to add to the discussion

mem10123 wrote:

I agree, voltage is probably an issue. Either just plug in through the computer's USB port, or get an AC-to-Cigarette-Lighter adapter and use the car charger that came with the unit, but in the house.

I put the unit into the car with a phone charger for cigarette lighter to usb device. My 1490 would cycle on and off. Using the charger cable that came with it, then my 1490 works normally.

I thought about getting an AC-to-Cigarette-Lighter adapter, but if my other little charger does the job OK, I don't actually need it.

I'd like a reply from another 1490 user that can tell me if my unit's response to the charger I am using is typical, and/or if they have a Garmin "010-10723-12" Ac charger, and that is what it does, too. But thanks to all for all the replies. - Ted

--
Ted in Ohio, c340, 1490T with lifetime maps

Same here on 1490

tkessel wrote:

I'd like a reply from another 1490 user that can tell me if my unit's response to the charger I am using is typical. But thanks to all for all the replies. - Ted

I have the 1490. I have an ac adapter for a Samsung camera. The adapter has a USB connector as the output. When the 1490 is connected to it, the unit operates exactly as you describe. The adapter says it puts out 4.4V.

Thank you!

Thanks jjen!

--
Ted in Ohio, c340, 1490T with lifetime maps

Garmin AC Charger

I have the AC charger which came with the 660 output
5V-1A. Will this one work with the 1450?

Probably

I can't say for sure, but it probably will, since, in this thread and by personal observation my "Motorola" cell phone charger works with the original cell phone, with another brand of cell phone that I have now, with my old Street Pilot c340, and my new nuvi 1490T.

--
Ted in Ohio, c340, 1490T with lifetime maps

Garmin Charger

I have a Garmin A/C charger (I can't seem to locate it at the moment though!) and, when I use it with my nüvi 760, the unit goes into charging mode. Period. When I try to use a different charger I get the behavior described above. The Garmin charger is obviously wired differently somehow.

Edit: I seemed to remember something about a different resistor being used in the Garmin charger that puts the unit into charging mode rather than mass storage mode. I did a search and found this thread:
http://www.poi-factory.com/node/17975

--
GPSMAP 76CSx - nüvi 760 - nüvi 200 - GPSMAP 78S

Yes, They Are Different

thrak wrote:

I have a Garmin A/C charger (I can't seem to locate it at the moment though!) and, when I use it with my nüvi 760, the unit goes into charging mode. Period. When I try to use a different charger I get the behavior described above. The Garmin charger is obviously wired differently somehow.

Edit: I seemed to remember something about a different resistor being used in the Garmin charger that puts the unit into charging mode rather than mass storage mode. I did a search and found this thread:
http://www.poi-factory.com/node/17975

as described here:

arrow http://pinouts.ru/GPS/garmin_nuvi_power_pinout.shtml

--
Tampa, FL - Garmin nüvi 660 (Software Ver 4.90), 2015.10 CN NA NT maps | Magellan Meridian Gold

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