i have a tom tom one - it doesn't seem to hold its charge. i have a home charger and car charge which both seem to charge it fine. when i switch it off and then go to use it again (month or so later) the battery is dead!
I have a TomTom GO 700 that only powers up after 30 minutes if plugged in. It will not power up without plugged in. I think its internal battery is dead and needs to be replaced. I updated latest TomTom software thru their website. I have talked to their support and had a very frustrating experience. They made me run around asking a bunch of questions back and forth for a week, got me fish out the sales receipt (who keeps sales receipt these days, but I found it). In the end, they say -- "it is out of warranty and there is nothing they can do to replace the battery or fix the unit". I have not heard of a device that costs several hundreds of dollars and mfr says "battery cannot be replaced and we won't do it". Actually I have had this problem 3 months before the supposedly warranty expiry date, but since I did not report it then, they wont do anything now being out of warranty by 2 months.
They have no suggestions for getting this fixed. They say they cannot replace the battery unless it is under warranty. They say they cannot repair it even if I want to pay for battery etc.