I have a suggestion for future versions of the Jetson development kit. You could include an additional, unconnected power plug that customers could use to make their own battery power cables. This would be inexpensive for NVIDIA to provide but a thoughtful added convenience.
The power adapter barrel plug I selected from my spare parts bin that fit my TX1 developer board unfortunately had a generous sized positive terminal surface. (I wasn’t going to cut up the supplied power adapter so soon!) The Jetson has a generous sized negative terminal on the power jack. My robot required 12V power to a USB hub and the Jetson, so I installed two plugs on the wire to the battery. The USB was plugged into the Jetson and when I plugged in the power to the board, I saw sparking. Apparently that was when I fried the power circuitry for the Jetson USB jack, for it doesn’t work now. The micro-USB jack operates but not the full-sized jack.