When you are charging the Garmin Nuvi 660 how do you know when its done charging?
When I charge my nuvi 660, I get a message on the screen that saying "switching to charging mode" or something like that and then the screen goes black. Unless I trun the unit on every now & then, how do I know when its fully charged?
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Plug the charger into the mini-usb jack. The unit should turn on and when you come to the main menu, you should see a lightning bolt over the battery bar graph. This indicates that it is charging. If you don't plan on using it and want to charge it over night, if your Nuvi has a push down power switch on the top, press and hold it briefly until it goes to a black screen and says charging. If your Nuvi has a slide switch, slide it to the left until you get the same charging screen. A few seconds later, the screen will go dark but if you touch the screen, it will light up again and say its charging and go dark again. After several hours, when you go to touch the screen it will say Charging Complete". Yiu will also notice then when you go to use it, you will see ALL of the green bars on the battery bar graph will be lit.
It sounds like your battery is defective. They can be replaced. The Motorola phone cable is not wired exactly like the Garmin, and your Nuvi thinks it's connected to a PC. Radio Shack carries a charger for the Nuvi. I have one myself.
Let me know if you need additional help with your battery problem.
folks, the garmins have an on-board battery that needs to be powered up (at least occasionally) via the usb port - like from your computer. just using the dc car power cord does nothing for this battery. i've had this exact same problem on both my 760 and 780 nuvi units. fixed it using the usb charge. seems to run down differently for all the various nuvi models. my regular charge will hold for 7 hours on my old 660, my 760 and 780 work about 5 hours. my 'power up' failed on the 660 after 10 months with no internal battery charge, but the 7xx models only took about 5-6 months to 'fail.' hope this helps. jack b :-) in midland, tx usa