VIA message that the battery is flat and needs power
edited March 7
y dose my tomtom via keep saying that the battery is flat and switching off when its is attached to the power as when I turn the car off it gose into sleep mode but then says battery is flat
f you have changed the battery
Are you using the supplied Cigarette socket or are you plugging the USB end of the cable into a USB socket on your car. If the latter then the output to the unit is only about 0.5amp whereas the supplied socket is 1.5amp. The extra power is needed to run the unit and charge it up as well.
prolonged use in an USB socket will result in the unit going in to battery save mode and eventually it will close down.