I have the go 720 tomtom gps.I can not charge it while driving, because my car lighter does not work.
How long does the battery last without being connected to any power outlet ?
Mine does not even last for an hour, i think is malfunctioning.
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The plugs which are used with car lighters are often very poor; compare the firmness of the seating of the lighter with your accessory plug.
The latter are often too loose to make decent contact.
Also, that plug is equipped with a fuse; unscrew the plug body and check the fuse.
I also recall someone having a failed plug on the Tomtom itself; it may be a weak point.
Remove the SD card and try to connect to your computer, the 720 maps are in the internal memory and the unit should start. If not try a hard Reset through the "Reset"hole in the case of the GPS. insert a small paper clip to reset the GPS.
The GO 720 charges quite slowly when attached to the in-vehicle cigarette lighter cord. If you have a USB attachment (that allows you to connect the GO720 to your computer) just insert the GO720 into the USB cradle - you don't have to turn it on - and let it sit there for about 10 hours. You should see the green light on the GO720 indicating that power is being received. In fact, I don't think you even need to turn on the computer, as power is always fed to the USB circuit. If you see the green light, then the GO720 is being charged. I think your GPS just needs a good charge.
I would suspect a collapsed battery if it does not charge on its base. Replace the battery, the life should be 2 years if used correctly. This means not plugging it to DC car power when starting engine. battery will collapse withing 6-12 months if you do
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there are ways u can charge your gps 1 is to buy extension for your lighter i know that the plug is very big adapter is about 6.00 to 15.00 dollars. also battery life after full charge is about 45 min not long at all your lap to will charge it ha hope u and your tom tom are very happy ps keep it pro k bye bye get it