No, that isn't necessary. You should be fine to use right out of the box, pluggable, for what ever amount of time you need. You don't need to schedule a road trip for the first use of the device.
You can actually use a cell phone charger to charge a typical GPS device with the appropriate cable, by the way.
I would suggest you connect the GPS device to your PC/laptop and update your maps if not already updated. There are always updates.
Good luck.