The rated voltage is something like 7V-19V, so 20V is probably too much.
If by “on board” you mean in a car, then the car battery should be good enough, with one caveat: You should add protection against “load dumps” that happen in car power systems.
Other batteries that will work fine include any LiPo battery from a RC car or plane, “2S” “3S” or “4S” capacity. (Translates to 7.4V, 11.1V or 14.8V average voltage.)
Note that LiPo batteries are damaged if you over-discharge them, and may catch on fire if charged after being damaged (or if over-charged,) so you also need some kind of over-discharge alarm or other protection device.
Simplest: Buy the following: Amazon.com And plug it into the cigarette lighter of your car. Plug the Jetson power adapter into the outlet.
Thank you for your answer!!!
I was wondering what is the exact size of DC input barrel as I ordered these [url]Amazon.com and it dose not fit into the power port of TX2 Board.
Googling the part numbers seem to indicate that it’s a 5.5x2.5mm power plug. Given that you already have the 2.1mm, perhaps the easiest is to get a converter: Amazon.com