Question about Garmin Nuvi 255WT 4.4 in. Car GPS Receiver
My Garmin 225WT won't charge from the 12V car cord or via USB. Have replaced the battery twice in last 2 days. Suspected the first replacement battery might be faulty. GPS works when plugged into the vehicle. What causes this?
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Posted on Jan 02, 2017
SOURCE: Garmin Nuvi 760
Sounds like you both have a battery problem. I experienced a similar problem when trying to charge via the USB-cable connected to my computer.
Ended up buying an original charger (expensive) and the charging went smooth.
The car charger should in any case work fine, so probably your battery is not very healthy.
Try holding your finger on the battery symbol for about 10 sec. The unit will then switch to a technical page. There you can observe the battery and charging voltage. When I plug in my computer USB-cable, I read around 4,4V and that is not sufficient for charging my battery.
When connected to the original charger, this voltage rises to about 5V which gives a nice charge. When unplugging charger, the unit displays the battery capacity. If the charging voltage is OK, but battery capacity drops quickly after you unplug charger cable, the battery is probably bad. (Of course you have to charge is for some time) I think around 4V battery voltage give 100% capacity. 3,9V gives about 90% capacity.
This will not solve your problem, but can give you an idea about what is wrong.
Posted on Nov 17, 2008
A new battery can be purchased and installed inexpensively. I found a video.
You-Tube video "yxP4PdRB_98" placeholder (do not delete)
Posted on Dec 26, 2009
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