They are supposed to be rechargeable, so if you can find the right cord just plug it in.
If the battery is faulty for some reason and won't charge, get in charge with the company and they will change the battery for you
To replace the battery in a TomTom One 14644, first, ensure the device is powered off. Use a small screwdriver to remove the screws on the back cover, then carefully lift off the cover. Disconnect the old battery from the circuit board and replace it with a compatible new battery, ensuring proper connection. Finally, reassemble the device by replacing the back cover and screws.
i found this write up [url moved to links]
If you need a battery then there is nothing that can replace it.
if the battery gets weak and useless, then you have to replace it...
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Lift up rear seat & replace battery
no
Remove the seat. Remove the battery. Replace the battery. Replace the seat.
The battery is located under the backseat, Lift the seat up and replace the battery.
The Tom Tom One 3rd Edition has a rechargeable internal Lithium ion battery. The estimated battery life on a full charge is 2 hours.