Yes.
well you will need the usb port cable that connects them then you plug it in download action replay code manager and your down
Yes, any charger that fits a DSi can be used to charge a 3DS, 2DS or New 3DS, they all use the same charger.
Yes, you can buy it at your local game shop or order one online.
buy a car charger
3DS chargers are the same thing. The DSi should come with a car charger too. GameStop sells chargers. If your lucky enough to come across a plug with the same shape, let me know, but I highly doubt you will...
No. The engine has to be running for the charging system to operate.
Sorry, but that is not likely to work. Both the voltage and amperage provided by a charger for a laptop battery will not be correct for a car battery. It is likely that you will damage the charger.
Yes.
The Samsung has a special car charger built just for it, that will work great while traveling.
yes they do work while the car is off becaise i drive a car and i got a phone charger and it still worked wit the car off.
None, since they are wired to the car.