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
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...
how to replace a mitsubishi endeavor battery
how to replace battery
no
how to replace a 1990 Chevy Beretta battery
Lift up rear seat & replace battery
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.
How to remove battery cover to replace battery